chore(release): v3.21.0 — TUI cleanup + client-tools/ToS docs + promotion plan (#145)

* refactor(tui): dead-code / footgun cleanup (A1/A2/A3)

ALIGNMENT.md Rule 2: infra-only, no new cli.js wire behavior.
No protocol, no endpoint, no credential changes.

A1 (session.mjs): delete resolveTuiEntrypointEnv() and its call site
+ the redundant env-strip block around the spawnSync call. The function
mutated a {env} object passed to spawnSync (tmux itself), but tmux does
NOT forward that env to the pane; the pane's claude gets its env ONLY
from the `env` prefix string built inside buildTuiCmd (verified live
2026-06-01). The spawnSync {env} is intentionally minimal now; only
env.HOME is retained (tmux binary reads it). All claude-specific vars
go via the buildTuiCmd prefix string, unchanged. Tests for the now-
deleted function removed; test count drops by 7 (expected).

A2 (transcript.mjs): delete encodeCwd() and transcriptPath() exports.
Production resolves transcripts exclusively via findTranscriptPath()
(glob by session-id); these two helpers carried a fragile path-encoding
rule used only by their own tests. grep confirms zero non-test importers.
Added a TODO comment near findTranscriptPath() noting a CI fixture-
contract test would make claude-schema drift fail loudly. Tests removed;
count drops by 2.

A3 (session.mjs + README): remove the CLAUDE_SKIP_PERMISSIONS branch
that pushed --dangerously-skip-permissions when OCP_TUI_FULL_TOOLS=1.
OCP_TUI_FULL_TOOLS=1 now always takes the --allowedTools path. Rationale:
claude v2.1.x shows an interactive bypass-acceptance screen that a
headless tmux TUI cannot answer — bricks the turn (tui_paste_not_landed
/ wallclock cap), not recoverable without a human. The working path is
--allowedTools + scratch-home settings.json additionalDirectories.
README OCP_TUI_FULL_TOOLS row updated to document the removal and the
correct alternative; CLAUDE_SKIP_PERMISSIONS row for the -p path is
unchanged (still used in server.mjs). Test updated: skip-permissions
case replaced with an assertion that --dangerously-skip-permissions is
absent from the full-tools command.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* docs: client-tools boundary, ToS honesty, promotion plan (B1/B2/B3)

ALIGNMENT.md Rule 2: docs-only, no new cli.js wire behavior.
No protocol, endpoint, or credential changes.

B1 (README): add 'Client-tools boundary' subsection under 'How It
Works'. Documents that OCP is a text-prompt bridge only — it does not
pass OpenAI tools/functions or Anthropic tool_use blocks to the client.
Clients receive assistant TEXT only; client-local tool execution is
not supported by design (bypassing cli.js = out of scope per
ALIGNMENT.md).

B2 (README): two updates to 'Why OCP?' and the LAN-sharing section.
(a) New bullet: OCP drives the official claude CLI as-is — no OAuth
token extraction, no binary patching, no protocol invention — so
traffic looks like genuine Claude Code (cc_entrypoint=cli).
(b) LAN-sharing paragraph strengthened: pooling one Claude subscription
across multiple distinct people may violate Anthropic's Consumer ToS
and risk account suspension by the abuse classifier. The defensible
framing is 'one person, your own devices'; friends/team sharing is
not. Replaces the softer 'account terms are your call' language.
Feature and auth-mode docs are unchanged.

B3 (docs/PROMOTION.md): new promotion strategy doc. Covers: goal
(polish + low-key OSS visibility, NOT growth-hacking given the live
ToS/billing risk), pre-requisites (stability first), honest ToS
disclosure requirement, items explicitly skipped (multi-backend
routing, gateway model-discovery — delegated to OLP; raw API
passthrough — ALIGNMENT.md scope), TUI toggle as billing-split
insurance, and low-key visibility actions. Framed as a recommendation
for the maintainer to review, not a committed plan.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* chore(release): v3.21.0 — TUI cleanup + docs honesty + promotion plan

ALIGNMENT.md Rule 2: release prep; no new cli.js wire behavior.

Bump version 3.20.1 → 3.21.0. CHANGELOG entry covers:
- A1/A2/A3 TUI dead-code removals (inert entrypoint-env path,
  test-only transcript helpers, headless-unusable skip-permissions)
- B1/B2/B3 docs (client-tools boundary, ToS honesty, Why-OCP posture,
  promotion plan)
- Previously-shipped v3.20.x items documented for completeness:
  spawn-home isolation, bounded concurrency queue + 429, ocp restart,
  ocp-plugin OpenClaw compat.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

---------

Co-authored-by: dtzp555 <dtzp555@gmail.com>
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

CHANGELOG.md

@@ -1,5 +1,29 @@
 # Changelog
 
+## v3.21.0 — 2026-06-25
+
+Cleanup + docs release: TUI dead-code removal, docs honesty, and release prep. No new `cli.js` wire behavior; the default path (`CLAUDE_TUI_MODE` unset) is byte-for-byte unchanged.
+
+### TUI dead-code / footgun cleanup
+
+- **A1 — removed inert entrypoint-env path** (`lib/tui/session.mjs`): deleted `resolveTuiEntrypointEnv()` and the redundant env-strip block in `runTuiTurn`. The `{env}` object passed to `spawnSync` (tmux itself) was the wrong target — tmux does NOT forward the spawning process's environment to the pane; the pane's `claude` gets its env exclusively from the `env` prefix string built inside `buildTuiCmd` (verified live 2026-06-01). The spawnSync env is now intentionally minimal (`HOME` only). Behavior is unchanged: `buildTuiCmd` already handled all claude-specific env vars via its prefix string.
+- **A2 — removed test-only transcript helpers** (`lib/tui/transcript.mjs`): deleted `encodeCwd()` and `transcriptPath()` exports and the tests that pinned them. Production resolves transcripts exclusively via `findTranscriptPath()` (glob by session-id), which is immune to the exact path-encoding rule. No non-test importers existed (grep confirms). A `// TODO` comment near `findTranscriptPath()` notes that a CI fixture-contract test would make claude-schema drift fail loudly.
+- **A3 — removed headless-unusable `--dangerously-skip-permissions` branch** (`lib/tui/session.mjs` + `README.md`): `OCP_TUI_FULL_TOOLS=1` now always takes the `--allowedTools` path. The removed branch pushed `--dangerously-skip-permissions` when `CLAUDE_SKIP_PERMISSIONS=true`; on claude v2.1.x this triggers an interactive bypass-acceptance screen that a headless tmux pane cannot answer → the turn hangs to the wallclock cap and bricks the pane. The working path is `--allowedTools` + scratch-home `settings.json` `additionalDirectories`. `CLAUDE_SKIP_PERMISSIONS` for the `-p` path is unchanged (still used in `server.mjs`).
+
+### Docs
+
+- **Client-tools boundary** (README `§ How It Works`): OCP is a text-prompt bridge only — it does not pass OpenAI `tools`/`functions` or Anthropic `tool_use` blocks to the client. Clients receive assistant TEXT only; client-local tool execution is not supported by design (bypassing `cli.js` = out of scope per `ALIGNMENT.md`).
+- **ToS honesty** (README `§ Deployment model & security`): pooling one Claude subscription across multiple distinct people may violate Anthropic's Consumer ToS and risk account suspension by the abuse classifier. The defensible framing is "one person, your own devices" — friends/team sharing is not. The prior language ("account terms are your call") was accurate but understated the risk.
+- **"Why OCP" posture** (README `§ Why OCP?`): new bullet making explicit that OCP drives the official `claude` CLI as-is — no OAuth token extraction, no binary patching, no protocol invention — so traffic looks like genuine Claude Code (`cc_entrypoint=cli`).
+- **Promotion plan** (`docs/PROMOTION.md`): "stable & visible" strategy covering goal (polish + low-key OSS visibility, NOT growth-hacking given the live ToS/billing risk), pre-requisites (stability first), honest ToS disclosure requirement, items explicitly skipped (multi-backend routing → OLP; gateway model-discovery; raw API passthrough → ALIGNMENT.md scope), TUI toggle as billing-split insurance, and low-key visibility actions. Framed as a recommendation for the maintainer to review, not a committed plan.
+
+### Previously shipped (v3.20.x) — documented here for completeness
+
+- **Default `-p` spawn-home isolation** (v3.20.0 / PR-A): per-request `claude` spawns run in a credential-free minimal scratch HOME (`$HOME/.ocp/spawn-home`, no `.credentials.json`/`settings.json`/plugins) with a neutral cwd and the env token, cutting per-request latency (measured ~10–28s → ~3–7s). Kill-switch: `OCP_SPAWN_REAL_HOME=1`. Active mode shown at startup and on `/health.spawn`.
+- **Bounded concurrency wait-queue** (v3.20.0 / PR-B): excess `-p` requests queue (up to `CLAUDE_MAX_QUEUE`, default 16) instead of being rejected; a full queue returns `HTTP 429` + `Retry-After` (not an opaque 500). New env vars: `CLAUDE_MAX_QUEUE`, `CLAUDE_QUEUE_RETRY_AFTER`. Surfaced on `/health.concurrency` + `/health.stats.queueRejections`.
+- **`ocp restart`** macOS `bootout`+`bootstrap` (v3.20.0 / PR-B): safe restart command that forces launchd to re-read the plist (unlike `kickstart -k` which reuses the cached env).
+- **`/ocp` plugin OpenClaw-2026.5.27 compat** (v3.20.0 / PR-C): gateway plugin updated for the current OpenClaw API version.
+
 ## v3.20.1 — 2026-06-13
 
 TUI-mode auth hardening: fixes the recurring `Please run /login · API Error: 401` (the PI231 incident) and reaps leaked defunct `claude` sessions. ([#141](https://github.com/dtzp555-max/ocp/pull/141))

README.md

@@ -31,6 +31,7 @@ There are several Claude proxy projects. OCP picks a specific lane: **align tigh
 - **SSE heartbeat for long reasoning** ([v3.12.0](https://github.com/dtzp555-max/ocp/releases/tag/v3.12.0), opt-in). If you've ever watched your IDE die at the 60s idle mark during a long Claude tool-use pause — that's nginx/Cloudflare default behavior. OCP emits an SSE comment frame to keep the connection alive without polluting the response. ([PR #49](https://github.com/dtzp555-max/ocp/pull/49))
 - **`cli.js` alignment + CI guardrail.** LLM-assisted code drifts easily — it's tempting to invent plausible-looking endpoints that `cli.js` doesn't actually use. [`ALIGNMENT.md`](./ALIGNMENT.md) is binding: every endpoint OCP exposes must cite a `cli.js` line. The [`alignment.yml`](./.github/workflows/alignment.yml) CI workflow blocks PRs that introduce known-hallucinated tokens. The payoff is boring: your setup keeps working when `cli.js` ships its next minor.
 - **`models.json` single source of truth** (v3.11.0). Adding a model is one file edit; both `/v1/models` and the OpenClaw bootstrap derive from it. ([PR #30](https://github.com/dtzp555-max/ocp/pull/30))
+- **Drives the official CLI as-is, no binary patching.** OCP spawns the official `claude` CLI (or hosts it in an interactive tmux pane for TUI mode) — it does not extract OAuth tokens from memory, patch the binary, or invent protocol extensions. Traffic therefore looks like genuine Claude Code to Anthropic's classifiers (`cc_entrypoint=cli`). See `ALIGNMENT.md` for why this constraint is load-bearing.
 
 ### Comparison
 
@@ -128,11 +129,12 @@ Before each step, tell me what you'll run and wait for confirmation.
 On any error, diagnose first — don't auto-retry.
 ```
 
-**LAN mode (server)** — install OCP as a server so your family or multiple devices can share it:
+**LAN mode (server)** — install OCP as a server so your own devices on the LAN can reach it (Claude Pro/Max are per-user accounts — review Anthropic's Usage Policy before extending access to other people):
 
 ```text
-I want to install OCP on this device as a LAN server so my family and other
-devices on the network can share my Claude Pro/Max subscription.
+I want to install OCP on this device as a LAN server so my own devices on the
+network can reach my Claude Pro/Max subscription through a local
+OpenAI-compatible endpoint.
 
 Please follow https://github.com/dtzp555-max/ocp/blob/main/README.md
 "Server Setup" → "LAN mode" path:
@@ -422,6 +424,7 @@ ocp keys revoke son-ipad   # Revoke a key
 - The per-key modes (`shared` / `multi`) give per-key **usage tracking, quotas, and cache separation** — useful for seeing who used what and capping budgets.
 - They do **not** give a **security isolation boundary**. The spawned `claude` runs with the **operator's filesystem access** and is *not* sandboxed per key. **Only share with people you fully trust, on a trusted network.**
 - For simple trusted family sharing, the easiest setup is a single shared **anonymous key** (see [Anonymous Access](#anonymous-access-optional)) — no per-person separation, same trust assumption.
+- **Account terms and ToS — read before sharing with others.** Claude Pro/Max are *per-user* accounts. Pooling a single subscription across **multiple distinct people** may violate Anthropic's Consumer Terms of Service and risk account suspension by the abuse classifier. The defensible framing is **"one person, your own devices"** — sharing with friends or a team is not. OCP does not change your account terms, and whether any particular sharing setup complies with the ToS is the account holder's responsibility. Review Anthropic's Usage Policy before extending access to other people.
 
 **Real per-user isolation (sandboxed, multi-tenant-safe) is planned for after 2026-06-15** — per-key ephemeral home + tool lockdown + an OS sandbox. Until then, treat a multi-user OCP as a *trusted-group convenience*, not a security boundary. (This is also why `CLAUDE_TUI_MODE` is single-user-only — see [Subscription-pool (TUI) mode](#subscription-pool-tui-mode).)
 
@@ -698,6 +701,14 @@ Your IDE → OCP (localhost:3456) → claude --output-format stream-json CLI →
 
 OCP translates OpenAI-compatible `/v1/chat/completions` requests into `claude --output-format stream-json` CLI calls. Anthropic sees normal Claude Code usage — no API billing, no separate key needed.
 
+### Client-tools boundary
+
+OCP is a **text-prompt bridge** to the official `claude` CLI. It does **not** pass through OpenAI `tools`/`functions` payloads or Anthropic `tool_use` blocks to the client. Clients (Cline, Cursor, OpenClaw, etc.) pointed at OCP receive **assistant TEXT only** — they never get `tool_calls` to execute locally.
+
+Any tool use happens server-side, under the `--allowedTools` set configured on the OCP host. In default mode (no `CLAUDE_NO_CONTEXT`), the `claude` CLI's own built-in tools are available to the model; in TUI mode, the operator controls the tool surface via `OCP_TUI_FULL_TOOLS`. Either way, the tools run under the operator's credentials on the server, and the client sees only the final text output.
+
+**Client-local tool execution is not supported by design.** Supporting it would require bypassing the `claude` CLI to call the raw Anthropic API directly — that is a different product, and is out of scope per `ALIGNMENT.md` (every OCP endpoint must correspond to something `cli.js` actually does).
+
 ## Available Models
 
 | Model ID | Notes |
@@ -842,6 +853,29 @@ ocp restart
 openclaw gateway restart
 ```
 
+### Env var change (e.g. `CLAUDE_BIND`, `CLAUDE_CODE_OAUTH_TOKEN`) doesn't take effect after restart
+
+On **macOS**, `ocp restart` does a full `launchctl bootout` + `bootstrap` of the agent, which **re-reads the plist `EnvironmentVariables`** — so an env change you made (in `~/Library/LaunchAgents/dev.ocp.proxy.plist`) actually takes effect:
+
+```bash
+ocp restart
+```
+
+This is deliberate: the older `launchctl kickstart -k` only re-execs the process and **reuses launchd's cached environment**, so plist env edits would be silently ignored. If you ever restart the agent by hand, use bootout+bootstrap, not `kickstart -k`:
+
+```bash
+launchctl bootout   gui/$(id -u)/dev.ocp.proxy 2>/dev/null
+launchctl bootstrap gui/$(id -u) ~/Library/LaunchAgents/dev.ocp.proxy.plist
+```
+
+Verify the new value reached the running process:
+
+```bash
+ps -E -p "$(launchctl print gui/$(id -u)/dev.ocp.proxy 2>/dev/null | awk '/pid =/{print $3}')" | tr ' ' '\n' | grep CLAUDE_
+```
+
+On **Linux**, `systemctl --user restart` already re-reads the unit's `EnvironmentFile`, so no special handling is needed.
+
 ### Usage shows "unknown"
 
 Usually caused by an expired Claude CLI session. Fix:
@@ -901,7 +935,9 @@ See [Subscription-pool (TUI) mode](#subscription-pool-tui-mode) and ADR 0007 PR-
 | `CLAUDE_BIN` | *(auto-detect)* | Path to claude binary |
 | `CLAUDE_TIMEOUT` | `600000` | Request timeout (ms, default: 10 min) |
 | `CLAUDE_HEARTBEAT_INTERVAL` | `0` | Streaming SSE keepalive interval (ms). `0` = disabled. See "Streaming heartbeat" section. |
-| `CLAUDE_MAX_CONCURRENT` | `8` | Max concurrent claude processes |
+| `CLAUDE_MAX_CONCURRENT` | `8` | Max concurrent claude processes (`-p`/stream-json path) |
+| `CLAUDE_MAX_QUEUE` | `16` | Max requests **waiting** for a `-p` concurrency slot. Beyond `CLAUDE_MAX_CONCURRENT`, requests queue (up to this cap) instead of being rejected; when the queue is **also** full, the request gets `HTTP 429` + `Retry-After` (not an opaque 500). Surfaced on `/health.concurrency` + `/health.stats.queueRejections`. |
+| `CLAUDE_QUEUE_RETRY_AFTER` | `5` | Seconds advertised in the `Retry-After` header on a `-p` concurrency-overflow `429`. |
 | `CLAUDE_MAX_PROMPT_CHARS` | `150000` | Prompt truncation limit (chars) |
 | `CLAUDE_SESSION_TTL` | `3600000` | Session expiry (ms, default: 1 hour) |
 | `CLAUDE_CACHE_TTL` | `0` | Response cache TTL (ms, 0 = disabled). Set to e.g. `300000` for 5-min cache |
@@ -913,13 +949,14 @@ See [Subscription-pool (TUI) mode](#subscription-pool-tui-mode) and ADR 0007 PR-
 | `PROXY_ADVERTISE_ANON_KEY` | *(unset)* | When `=1`, advertise `PROXY_ANONYMOUS_KEY` in the public `/health` body for remote zero-config discovery. Default off — `/health` is unauthenticated, so this exposes the shared key to any LAN-reachable device (issue #109). Localhost always sees it regardless. |
 | `CLAUDE_TUI_MODE` | `false` | **Opt-in.** Set to `"true"` to serve requests via interactive `claude` (no `-p` / `--output-format` → `cc_entrypoint=cli`, subscription pool). **Single-user only** — see [Subscription-pool (TUI) mode](#subscription-pool-tui-mode) for the security constraint. |
 | `CLAUDE_CODE_OAUTH_TOKEN` | *(unset)* | OAuth bearer token (highest-precedence credential source for the `-p` path). **Recommended for TUI-mode hosts:** when set (and `OCP_TUI_HOME` unset), OCP runs the interactive `claude` in a **credential-isolated home** (`$HOME/.ocp-tui/home`, no `credentials.json`) so this long-lived token is the only credential and is authoritative — interactive `claude` otherwise *prefers* `~/.claude/.credentials.json` over the env var, so a stale one shadows the token and its single-use refresh token gets corrupted by the spawn/teardown cycle (the permanent `Please run /login` 401 — see [Subscription-pool (TUI) mode](#subscription-pool-tui-mode) and ADR 0007 PR-D). The token appears in the pane command (ps-visible) — acceptable for the single-user A-path; the multi-user B-path is refused at boot. |
+| `OCP_SPAWN_REAL_HOME` | *(unset)* | Kill-switch for the default `-p`/stream-json **spawn-home isolation** (latency fix). When unset and an OAuth token is resolvable, OCP runs the per-request `claude` spawn in a **credential-free minimal scratch home** (`$HOME/.ocp/spawn-home`, no `.credentials.json`/`settings.json`/plugins) with a neutral cwd and the env token — so it loads none of the operator's heavy global `~/.claude` (plugins/skills/hooks) or the project `CLAUDE.md`, cutting per-request latency (measured ~10–28s → ~3–7s). Set to `"1"` to force the legacy real-`HOME` spawn (no cwd override) even when a token exists. With **no** resolvable token, OCP falls back to the real `HOME` automatically (zero regression). Active mode is shown at startup and on `/health.spawn`. |
 | `CLAUDE_TUI_WALLCLOCK_MS` | `120000` | (TUI-mode) Maximum time in ms to wait for the native transcript to signal turn completion. Increase for long Opus thinking turns. |
 | `OCP_TUI_CWD` | `$HOME/.ocp-tui/work` | (TUI-mode) Scratch working directory where interactive claude sessions run. Transcripts land under `<HOME>/.claude/projects/<encoded-cwd>/`. Created automatically. |
 | `OCP_TUI_HOME` | *(auto)* | (TUI-mode) `HOME` claude runs under. **When unset, OCP picks it for you:** if `CLAUDE_CODE_OAUTH_TOKEN` is set → a **credential-isolated** scratch home `$HOME/.ocp-tui/home` (no `credentials.json`, env-token auth — **recommended**); if no env token → the operator's real home (legacy shared `credentials.json`). Setting this to an **explicit** path overrides the auto-default. The credential handling at that path still follows the env token: **with** the env token it is credential-free (env-token auth, no `credentials.json` written); **without** the env token (and the path ≠ real home) it uses the legacy symlinked-credentials scratch mode, which carries the credential-fork caveat — see ADR 0007. |
 | `OCP_TUI_ENTRYPOINT` | `cli` | (TUI-mode) Billing-classifier labeling: `cli` (default) pins `cc_entrypoint=cli` deterministically; `auto` lets claude self-classify via TTY detection; `off` leaves the inherited env untouched. Honest only when the spawn is a genuine interactive PTY — see ADR 0007. |
 | `OCP_TUI_MAX_CONCURRENT` | `2` | (TUI-mode) Max concurrent interactive TUI turns. **Independent** of `CLAUDE_MAX_CONCURRENT` (which bounds the `-p`/stream-json path; TUI never uses it). A TUI turn is heavy (per-request cold-boot of tmux+claude + up to `CLAUDE_TUI_WALLCLOCK_MS` wallclock), so the default is low to keep small hosts (e.g. a Pi 4) alive under a burst. Excess turns **queue** (bounded); a full queue yields a 503. See ADR 0007 PR-B amendment. |
 | `OCP_SKIP_AUTH_TEST` | *(unset)* | When `=1`, skip the `claude -p` auth probe during `setup.mjs`. After 2026-06-15 this probe draws from the Agent SDK credit pool; set this to avoid burning a metered credit on re-installs or `ocp update` runs. Auth is validated at the first real request. |
-| `OCP_TUI_FULL_TOOLS` | *(unset)* | (TUI-mode, **single-user only**) When `=1`, grant the interactive session the **same tool surface as the `-p` path** — `--allowedTools` (+ optional `--mcp-config` / `--dangerously-skip-permissions`, read from `CLAUDE_ALLOWED_TOOLS` / `CLAUDE_MCP_CONFIG` / `CLAUDE_SKIP_PERMISSIONS`) — instead of the default MCP-walled, built-in-tools-only set. Lets a trusted single-operator TUI deployment run a **tool-using / MCP agent** (e.g. an OpenClaw assistant) on the subscription pool. Safe because TUI **refuses to boot under `AUTH_MODE=multi`** (hard exit) — no guest key can ever reach the TUI path, so this gate cannot expose tools to an untrusted caller. (Under `AUTH_MODE=shared` + `OCP_TUI_ALLOW_LAN=1`, anyone holding the single shared key reaches it — that is the existing TUI trust model, unchanged.) See [Subscription-pool (TUI) mode](#subscription-pool-tui-mode) and ADR 0007. |
+| `OCP_TUI_FULL_TOOLS` | *(unset)* | (TUI-mode, **single-user only**) When `=1`, grant the interactive session the **same tool surface as the `-p` path** — `--allowedTools` (+ optional `--mcp-config`, read from `CLAUDE_ALLOWED_TOOLS` / `CLAUDE_MCP_CONFIG`) — instead of the default MCP-walled, built-in-tools-only set. Lets a trusted single-operator TUI deployment run a **tool-using / MCP agent** (e.g. an OpenClaw assistant) on the subscription pool. Safe because TUI **refuses to boot under `AUTH_MODE=multi`** (hard exit) — no guest key can ever reach the TUI path, so this gate cannot expose tools to an untrusted caller. (Under `AUTH_MODE=shared` + `OCP_TUI_ALLOW_LAN=1`, anyone holding the single shared key reaches it — that is the existing TUI trust model, unchanged.) Note: `--dangerously-skip-permissions` / `CLAUDE_SKIP_PERMISSIONS` is **not** supported for TUI — claude v2.1.x shows an interactive bypass-acceptance screen in headless tmux that cannot be answered, bricking the pane. Use scratch-home `settings.json` `additionalDirectories` instead. See [Subscription-pool (TUI) mode](#subscription-pool-tui-mode) and ADR 0007. |
 
 ### Streaming heartbeat
 

docs/PROMOTION.md

@@ -0,0 +1,100 @@
+# OCP Promotion Strategy — "Stable & Visible"
+
+> **This document is a recommendation for the maintainer to review and adjust, not a committed plan.**
+> It reflects the project's current posture (post-v3.21.0) and should be revisited whenever
+> the Anthropic billing / ToS environment changes significantly.
+
+---
+
+## 1. Goal: Polish + Low-Key OSS Visibility
+
+The goal is **stability and quiet discoverability**, not growth-hacking. OCP is a personal power tool
+that has been open-sourced because others can benefit from it. The right audience finds it via GitHub
+search, issue threads in related projects, and word of mouth — not viral posts.
+
+**Explicitly avoid:**
+
+- HN / Reddit front-page pushes, influencer outreach, or any campaign that would attract a large
+  influx of users before the ToS/billing situation has settled. Anthropic is actively tightening
+  billing and enforcement on subscription-sharing (the June-15 Agent-SDK billing split is
+  *paused*, not cancelled — and consumer-ToS enforcement on multi-person sharing is a live risk).
+  A high-traffic spotlight right now would draw scrutiny that a low-profile project avoids.
+- Promising features that require bypassing the `claude` CLI (raw API calls, OAuth extraction, etc.)
+  — that would violate `ALIGNMENT.md` and the ToS simultaneously.
+
+---
+
+## 2. Pre-Requisite: Stability First
+
+Do not promote until the house is in order:
+
+- [x] The concurrency / latency perf fixes are shipped (v3.20.x–v3.21.0).
+- [x] Docs honesty is complete (client-tools boundary, ToS sharing disclosure, this doc).
+- [ ] The June-15 Agent-SDK billing split is either confirmed cancelled or OCP has a confirmed
+      stable path (TUI toggle as insurance — see §5 below).
+
+Promoting a project that has known rough edges in docs or stability only generates support burden
+and negative first impressions.
+
+---
+
+## 3. Honest ToS Disclosure on Sharing
+
+Any promotion materials must carry the same disclosure as `README.md § "Deployment model & security"`:
+
+> Pooling a single Claude subscription across **multiple distinct people** may violate Anthropic's
+> Consumer Terms of Service and risk account suspension. The defensible framing is "one person,
+> your own devices". Friends/team sharing is not.
+
+This framing should appear in any README badge, linked blog post, or issue comment that mentions
+LAN sharing. It is not a disclaimer that discourages usage — it is honest positioning that protects
+both the project and its users.
+
+---
+
+## 4. What to Explicitly Skip
+
+These items are **not gaps in OCP** — they are deliberate stance decisions:
+
+- **Multi-backend routing** (routing to OpenAI, Gemini, Llama, etc.) — that is the sibling [OLP
+  project](https://github.com/dtzp555-max/olp)'s role. OCP stays Claude-only by design.
+- **Gateway model-discovery** (auto-detecting which models a remote server offers) — not needed
+  for OCP's single-provider, single-subscription model. `models.json` is the SPOT.
+- **Raw Anthropic API passthrough** (bypassing the `claude` CLI) — out of scope per `ALIGNMENT.md`.
+
+Do not add these to OCP roadmaps or respond to feature requests for them with "planned" — the
+correct answer is "that's OLP territory" or "out of scope per ALIGNMENT.md".
+
+---
+
+## 5. TUI Toggle as Insurance
+
+The `CLAUDE_TUI_MODE` opt-in is the primary mitigation if the June-15 billing split reactivates
+and makes the default `-p` path draw from the metered Agent SDK credit pool.
+
+Keep the TUI toggle:
+- Functional and tested across the three deployment hosts.
+- Documented in the README, including the security constraints (single-user only).
+- Easily discoverable for users who get unexpectedly metered.
+
+If the split reactivates, the recommended operator path is: set `CLAUDE_TUI_MODE=true` +
+`CLAUDE_CODE_OAUTH_TOKEN` → credential-isolated scratch home → subscription pool. That path is
+already shipped and documented.
+
+---
+
+## 6. Low-Key Visibility Actions (when §2 pre-requisites are met)
+
+- Keep the GitHub README polished and honest — it is the primary landing page.
+- Respond promptly to issues and PRs — the project's reputation is built on reliability, not
+  marketing.
+- Add OCP to the `awesome-claude` / `awesome-llm-tools` lists if they exist and allow self-PRs
+  — low-effort, targeted, reaches the right audience.
+- When related projects (Cline, OpenCode, OpenClaw, Continue.dev) post about local Claude proxies,
+  a short factual comment linking to OCP is appropriate — not spam.
+- Maintain the `CHANGELOG.md` with clear, honest summaries — users who are already running OCP
+  are the best vector for word-of-mouth.
+
+---
+
+*Last updated: v3.21.0 cleanup cycle. Maintainer should re-read before any external promotion.*

lib/tui/session.mjs

@@ -244,23 +244,6 @@ export function prepareTuiHome(realHome, tuiHome, cwd, { envTokenMode = false }
   ensureTuiCwdTrusted(tuiHome, cwd);
 }
 
-// ── Billing-classifier labeling ─────────────────────────────────────────
-// Resolve CLAUDE_CODE_ENTRYPOINT on the spawn env per mode. ALWAYS deletes any
-// inherited value first (so a stray entrypoint from OCP's own parent env can never
-// leak into / mislabel the billing header). Then:
-//   "cli"  (default) → set "cli": deterministic subscription-pool classification.
-//          HONEST ONLY because OCP's spawn is a genuine interactive PTY (tmux pane,
-//          no -p, stdout not redirected). Never set "cli" on a non-interactive spawn.
-//   "auto" → leave unset → claude self-classifies via its t$A (TTY → cli). Use to
-//          observe/diagnose the real TTY-derived value.
-//   "off"  → leave the env exactly as inherited (diagnostics / honesty audit).
-export function resolveTuiEntrypointEnv(env, mode = "cli") {
-  if (mode === "off") return env;
-  delete env.CLAUDE_CODE_ENTRYPOINT;
-  if (mode === "cli") env.CLAUDE_CODE_ENTRYPOINT = "cli";
-  return env;
-}
-
 // Build interactive claude argv: NO -p, NO --output-format (=> cc_entrypoint=cli).
 // MCP hard-disabled: --strict-mcp-config (no --mcp-config) is the only mechanism
 // that stops account-attached managed MCP from connecting (spec §5.2 / T6),
@@ -321,18 +304,16 @@ export function buildTuiCmd(claudeBin, model, sessionId, ehome, entrypointMode)
   //   DEFAULT (safe): hard-disable MCP (--strict-mcp-config + --disallowedTools mcp__*);
   //     built-in tools stay on, acceptable for single-user A-path.
   //   OCP_TUI_FULL_TOOLS=1: grant the SAME tool surface as the -p A-path
-  //     (--allowedTools [+ --mcp-config] [+ --dangerously-skip-permissions]), so a
-  //     SINGLE-USER / trusted TUI deployment can run a tool-using agent (e.g. an OpenClaw
-  //     assistant that needs Bash/Read/Write/MCP) on the subscription pool. This mirrors
-  //     buildCliArgs() in server.mjs. Safe to gate ON only because TUI is hard-incompatible
-  //     with AUTH_MODE=multi (server.mjs refuses to boot), so it can never widen a guest's
-  //     surface. Env mirrors server.mjs's CLAUDE_ALLOWED_TOOLS / _SKIP_PERMISSIONS / _MCP_CONFIG.
+  //     (--allowedTools [+ --mcp-config]), so a SINGLE-USER / trusted TUI deployment can
+  //     run a tool-using agent (e.g. an OpenClaw assistant that needs Bash/Read/Write/MCP)
+  //     on the subscription pool. ALWAYS uses --allowedTools (CLAUDE_SKIP_PERMISSIONS /
+  //     --dangerously-skip-permissions is intentionally removed: claude v2.1.x shows an
+  //     interactive bypass-acceptance screen in headless tmux that nothing can answer →
+  //     the turn hangs until the wallclock cap, bricks the pane; not recoverable without a
+  //     human at a keyboard). Use scratch-home settings.json additionalDirectories instead.
   let toolArgs;
   if (process.env.OCP_TUI_FULL_TOOLS === "1") {
     toolArgs = [];
-    if (process.env.CLAUDE_SKIP_PERMISSIONS === "true") {
-      toolArgs.push("--dangerously-skip-permissions");
-    } else {
     const allowed = (process.env.CLAUDE_ALLOWED_TOOLS ||
       "Bash,Read,Write,Edit,Glob,Grep,WebSearch,WebFetch,Agent")
       .split(",").map((s) => s.trim()).filter(Boolean);
@@ -341,7 +322,6 @@ export function buildTuiCmd(claudeBin, model, sessionId, ehome, entrypointMode)
     // like "Bash(npm run test:*)" / "Read(~/**)" whose ( ) * ~ would break/inject the shell
     // command if pasted bare. (operator-self-injection only — guests can't reach TUI.)
     if (allowed.length) toolArgs.push("--allowedTools", ...allowed.map(shq));
-    }
     if (process.env.CLAUDE_MCP_CONFIG) toolArgs.push("--mcp-config", shq(process.env.CLAUDE_MCP_CONFIG));
   } else {
     toolArgs = ["--strict-mcp-config", "--disallowedTools", shq("mcp__*")];
@@ -405,15 +385,11 @@ export async function runTuiTurn({
   const promptFile = `${tmpDir}/prompt.txt`;
   writeFileSync(promptFile, prompt, { mode: 0o600 });
 
-  // Build the env: disable marketplace auto-install, strip any Anthropic / CC
-  // env vars that might interfere with interactive-mode classification.
-  const env = { ...process.env, CLAUDE_CODE_DISABLE_OFFICIAL_MARKETPLACE_AUTOINSTALL: "1" };
-  delete env.CLAUDECODE;
-  delete env.ANTHROPIC_API_KEY;
-  delete env.ANTHROPIC_BASE_URL;
-  delete env.ANTHROPIC_AUTH_TOKEN;
-  env.HOME = ehome; // claude reads credentials + writes the transcript under this HOME
-  resolveTuiEntrypointEnv(env, entrypointMode);
+  // Minimal env for spawnSync (tmux itself). The pane's claude env comes exclusively
+  // from the `env` prefix string built inside buildTuiCmd — tmux does NOT forward the
+  // spawning process's env to the pane, so the {env} here is intentionally minimal.
+  const env = { ...process.env };
+  env.HOME = ehome; // tmux needs HOME; all claude-specific vars go via buildTuiCmd prefix
 
   try {
     // 1. Boot the interactive session inside tmux, rooted at the scratch cwd.

lib/tui/transcript.mjs

@@ -9,24 +9,11 @@ import { readFileSync, existsSync, readdirSync } from "node:fs";
 
 const sleep = (ms) => new Promise((r) => setTimeout(r, ms));
 
-// Project-dir encoding: claude replaces every "/" AND every "." with "-".
-// Verified live (claude v2.1.158): cwd /home/u/.ocp-tui/work is stored under
-// projects/-home-u--ocp-tui-work/ (the "." in ".ocp-tui" becomes "-", yielding
-// the double dash). The earlier "/"-only rule was wrong for dotted paths; the
-// fixture cwd /tmp/tui-test happened to have no dots so it never surfaced.
-// NOTE: prefer findTranscriptPath() (glob by session-id) for resolution — it is
-// immune to the exact encoding rule. This helper is kept for the known-path case.
-export function encodeCwd(cwd) {
-  return cwd.replace(/[/.]/g, "-");
-}
-
-export function transcriptPath(home, cwd, sessionId) {
-  return `${home}/.claude/projects/${encodeCwd(cwd)}/${sessionId}.jsonl`;
-}
-
 // Locate a session's transcript by its UUID across every projects subdir, without
 // reconstructing the encoded cwd. Robust to whatever encoding claude applies.
 // Returns the path, or null if not present yet (it appears once the turn starts).
+// TODO: add a CI fixture-contract test (a captured real transcript) so schema drift
+//       in the claude JSONL format fails loudly rather than silently degrading.
 export function findTranscriptPath(home, sessionId) {
   if (!home || !sessionId) return null;
   const root = `${home}/.claude/projects`;

ocp

@@ -573,21 +573,42 @@ Usage:
   ocp restart            Restart the Claude proxy service
   ocp restart gateway    Restart the OpenClaw gateway
                          (briefly disconnects all Telegram/Discord bots)
+
+Note (macOS): restart does a full launchctl bootout + bootstrap, NOT
+`kickstart -k`. bootout+bootstrap re-reads the plist's EnvironmentVariables,
+so an env change you made (e.g. CLAUDE_BIND, CLAUDE_CODE_OAUTH_TOKEN) actually
+takes effect. `kickstart -k` only re-execs the process and reuses launchd's
+cached env, so env edits would be silently ignored. (Linux systemctl already
+re-reads its EnvironmentFile on restart.)
 EOF
 }
 
+# macOS only: reload a launchd agent via bootout + bootstrap so plist
+# EnvironmentVariables are re-read (kickstart -k would reuse the cached env).
+# Args: <uid> <label> <plist-path>. Returns 0 iff bootstrap succeeds.
+_launchd_reload() {
+  local uid="$1" label="$2" plist="$3"
+  [[ -f "$plist" ]] || return 1
+  # bootout may legitimately fail if the agent is not currently loaded — that's fine,
+  # we only require the subsequent bootstrap to succeed (the load that re-reads env).
+  launchctl bootout "gui/$uid/$label" 2>/dev/null || true
+  launchctl bootstrap "gui/$uid" "$plist" 2>/dev/null
+}
+
 cmd_restart() {
   if [[ "${1:-}" == "gateway" ]]; then
     echo "Restarting gateway..."
     openclaw gateway restart 2>&1
   else
     echo "Restarting proxy..."
-    # Try current service name, then legacy, then manual restart
+    # Try current service name, then legacy, then manual restart.
+    # macOS: bootout+bootstrap (re-reads plist EnvironmentVariables — see cmd_restart_help).
+    # Linux: systemctl --user restart already re-reads its EnvironmentFile.
     local uid
     uid=$(id -u)
-    if launchctl kickstart -k "gui/$uid/dev.ocp.proxy" 2>/dev/null; then
+    if _launchd_reload "$uid" "dev.ocp.proxy" "$HOME/Library/LaunchAgents/dev.ocp.proxy.plist"; then
       true
-    elif launchctl kickstart -k "gui/$uid/ai.openclaw.proxy" 2>/dev/null; then
+    elif _launchd_reload "$uid" "ai.openclaw.proxy" "$HOME/Library/LaunchAgents/ai.openclaw.proxy.plist"; then
       true
     elif systemctl --user restart ocp-proxy 2>/dev/null; then
       true

ocp-plugin/package.json

@@ -1,6 +1,6 @@
 {
   "name": "ocp",
-  "version": "3.12.0",
+  "version": "3.16.2",
   "description": "Slash commands for the OpenClaw Proxy",
   "main": "index.js",
   "type": "module",
@@ -9,6 +9,7 @@
   "openclaw": {
     "type": "plugin",
     "id": "ocp",
-    "pluginManifest": "openclaw.plugin.json"
+    "pluginManifest": "openclaw.plugin.json",
+    "extensions": ["./index.js"]
   }
 }

package.json

@@ -1,6 +1,6 @@
 {
   "name": "open-claude-proxy",
-  "version": "3.20.1",
+  "version": "3.21.0",
   "description": "OCP (Open Claude Proxy) — use your Claude Pro/Max subscription as an OpenAI-compatible API for any IDE. Works with Cline, OpenCode, Aider, Continue.dev, OpenClaw, and more.",
   "type": "module",
   "bin": {

server.mjs

@@ -20,7 +20,10 @@
  *   CLAUDE_MCP_CONFIG            — path to MCP server config JSON file
  *   CLAUDE_SESSION_TTL           — session TTL in ms (default: 3600000 = 1h)
  *   CLAUDE_MAX_CONCURRENT        — max concurrent claude processes, -p/stream-json path (default: 8)
+ *   CLAUDE_MAX_QUEUE             — max requests waiting for a -p slot before HTTP 429 (default: 16)
  *   OCP_TUI_MAX_CONCURRENT       — max concurrent interactive TUI turns, TUI-mode path (default: 2)
+ *   OCP_SPAWN_REAL_HOME          — "1" forces the -p spawn to use the real HOME (disables the
+ *                                  latency spawn-home isolation; default: isolated when a token exists)
  *   CLAUDE_BREAKER_THRESHOLD     — failures in window before circuit opens (default: 6)
  *   CLAUDE_BREAKER_COOLDOWN      — base ms to wait before retrying after circuit opens (default: 120000)
  *   CLAUDE_BREAKER_WINDOW        — sliding window duration in ms (default: 300000 = 5min)
@@ -31,7 +34,7 @@
 import { createServer } from "node:http";
 import { spawn, execFileSync } from "node:child_process";
 import { randomUUID, timingSafeEqual } from "node:crypto";
-import { readFileSync, readdirSync, accessSync, existsSync, constants, chmodSync, statSync } from "node:fs";
+import { readFileSync, readdirSync, accessSync, existsSync, constants, chmodSync, statSync, mkdirSync, writeFileSync, rmSync } from "node:fs";
 import { fileURLToPath } from "node:url";
 import { dirname, join } from "node:path";
 import { homedir } from "node:os";
@@ -272,6 +275,15 @@ const SYSTEM_PROMPT = process.env.CLAUDE_SYSTEM_PROMPT || "";
 const MCP_CONFIG = process.env.CLAUDE_MCP_CONFIG || "";
 let SESSION_TTL = parseInt(process.env.CLAUDE_SESSION_TTL || "3600000", 10);
 let MAX_CONCURRENT = parseInt(process.env.CLAUDE_MAX_CONCURRENT || "8", 10);
+// FIX ⑥ (concurrency): bound on requests WAITING for a -p concurrency slot. Beyond
+// MAX_CONCURRENT, requests queue (up to CLAUDE_MAX_QUEUE) instead of being rejected; when the
+// queue is ALSO full, the request gets HTTP 429 + Retry-After (not an opaque 500). See
+// claudeSemaphore / acquireClaudeSlot below.
+const CLAUDE_MAX_QUEUE = parseInt(process.env.CLAUDE_MAX_QUEUE || "16", 10);
+// Retry-After seconds advertised on a 429 backpressure response. A claude turn is typically a
+// few seconds to tens of seconds; a small constant nudge keeps well-behaved clients from
+// hammering while the queue drains.
+const CLAUDE_QUEUE_RETRY_AFTER = parseInt(process.env.CLAUDE_QUEUE_RETRY_AFTER || "5", 10);
 const BREAKER_THRESHOLD = parseInt(process.env.CLAUDE_BREAKER_THRESHOLD || "6", 10);
 const BREAKER_COOLDOWN = parseInt(process.env.CLAUDE_BREAKER_COOLDOWN || "120000", 10);
 const BREAKER_WINDOW = parseInt(process.env.CLAUDE_BREAKER_WINDOW || "300000", 10);
@@ -279,6 +291,12 @@ const BREAKER_HALF_OPEN_MAX = parseInt(process.env.CLAUDE_BREAKER_HALF_OPEN_MAX
 const HEARTBEAT_INTERVAL = parseInt(process.env.CLAUDE_HEARTBEAT_INTERVAL || "0", 10);
 const BIND_ADDRESS = process.env.CLAUDE_BIND || "127.0.0.1";
 const NO_CONTEXT = process.env.CLAUDE_NO_CONTEXT === "true";
+// Kill-switch for the FIX-③ default-path spawn-home isolation (see resolveSpawnHome /
+// spawnHomeMode below). When "1", the -p/stream-json spawn always runs in the operator's
+// real HOME with no cwd override — byte-for-byte the pre-isolation behaviour — even if an
+// OAuth token is resolvable. Provided as an escape hatch in case a host depends on the real
+// HOME's claude config for the spawned process.
+const SPAWN_REAL_HOME = process.env.OCP_SPAWN_REAL_HOME === "1";
 const AUTH_MODE = process.env.CLAUDE_AUTH_MODE || (PROXY_API_KEY ? "shared" : "none");
 const ADMIN_KEY = process.env.OCP_ADMIN_KEY || "";
 const PROXY_ANONYMOUS_KEY = process.env.PROXY_ANONYMOUS_KEY || "";
@@ -332,6 +350,116 @@ const tuiStats = {
   entrypointMismatches: 0,   // count of cli-expected-but-got-other turns
 };
 
+// ── FIX ③ (latency): default-path (-p / stream-json) spawn-home isolation ──────────────
+// PROBLEM (measured, not theoretical): OCP's default spawn inherits the operator's real HOME
+// (loading the global ~/.claude — plugins, skills, hooks) and runs with cwd=~/ocp (loading the
+// project CLAUDE.md / skills) on EVERY request. Pure Anthropic API floor for haiku "hi" ≈ 1–2s;
+// the same claude CLI spawned in the operator's real HOME/cwd ≈ 10–28s; a clean minimal HOME +
+// CLAUDE_CODE_OAUTH_TOKEN ≈ 3–7s and authenticates fine. So the heavy global config is pure
+// per-request latency tax with no proxy benefit (a proxy must NOT leak the host's context into
+// the proxied turn — same rationale as NO_CONTEXT / the TUI path's CLAUDE_MDS suppression).
+//
+// FIX: when an OAuth token is resolvable, run the default spawn under a CREDENTIAL-FREE minimal
+// scratch HOME (`<realHome>/.ocp/spawn-home`) with cwd = that same neutral dir, and pass the
+// resolved token via CLAUDE_CODE_OAUTH_TOKEN so the env token is authoritative. This MIRRORS the
+// TUI path's resolveTuiHome() env-token mode (lib/tui/session.mjs): for `-p`, the env token wins
+// over a credentials.json (the opposite of interactive claude), so credential isolation is not
+// even strictly required for auth here, but a credential-FREE home is still the right shape —
+// nothing to refresh, nothing to corrupt, no heavy config to load.
+//
+// SAFETY: if NO token is resolvable → fall back to the real HOME with no cwd override (zero
+// regression). OCP_SPAWN_REAL_HOME=1 forces that legacy behaviour even when a token exists.
+// The scratch home holds NO .credentials.json / NO settings.json / NO plugins — it is created
+// minimal and (re)cleaned of any settings.json on prepare.
+const SPAWN_HOME_DIR = `${process.env.HOME}/.ocp/spawn-home`;
+
+// Idempotently prepare the minimal scratch HOME. Creates the dir if missing and removes any
+// settings.json that might have crept in, so the spawned claude loads no host settings/plugins.
+// Best-effort: a failure here degrades toward "dir may be missing", which spawn() tolerates by
+// erroring loudly — never a silent auth/credential corruption (there are no credentials here).
+function prepareSpawnHome(dir = SPAWN_HOME_DIR) {
+  try {
+    mkdirSync(`${dir}/.claude`, { recursive: true });
+    // Belt-and-braces: ensure no settings.json/plugins leak in (this home is fully ours).
+    for (const f of [`${dir}/.claude/settings.json`, `${dir}/.claude/settings.local.json`]) {
+      try { if (existsSync(f)) rmSync(f, { force: true }); } catch { /* best effort */ }
+    }
+  } catch { /* best effort — spawn will surface a hard error if the dir is truly unusable */ }
+}
+
+// Resolve the default-spawn HOME-isolation decision ONCE, lazily + memoized (so it runs after
+// getOAuthCredentials is defined regardless of source order, and the token probe happens at most
+// once). Returns { isolated, home, token } where:
+//   - isolated:true  → spawn under SPAWN_HOME_DIR with cwd=SPAWN_HOME_DIR + the env token.
+//   - isolated:false → legacy real-HOME spawn, no cwd override (no token, or kill-switch on).
+// NEVER logs/returns the token verbatim to any caller that logs; spawnClaudeProcess uses it only
+// to populate the spawn env. token is null when isolation is off.
+let _spawnHomeMode = null;
+function getSpawnHomeMode() {
+  if (_spawnHomeMode) return _spawnHomeMode;
+  if (SPAWN_REAL_HOME) {
+    _spawnHomeMode = { isolated: false, home: null, token: null, reason: "kill-switch (OCP_SPAWN_REAL_HOME=1)" };
+    return _spawnHomeMode;
+  }
+  let token = null;
+  try { token = getOAuthCredentials()?.accessToken || null; } catch { token = null; }
+  if (token) {
+    prepareSpawnHome(SPAWN_HOME_DIR);
+    _spawnHomeMode = { isolated: true, home: SPAWN_HOME_DIR, token, reason: "oauth token resolved" };
+  } else {
+    _spawnHomeMode = { isolated: false, home: null, token: null, reason: "no oauth token resolvable" };
+  }
+  return _spawnHomeMode;
+}
+
+// ── FIX ⑥ (concurrency): bounded wait-queue for the -p / stream-json path ──────────────
+// PROBLEM (proven): spawnClaudeProcess used `if (activeRequests >= MAX_CONCURRENT) throw` →
+// the client got an opaque 500 AND the rejection was NOT counted in stats (a 15-concurrent
+// stress run returned 7×500 while /health stats.errors stayed 0). The TUI path already has a
+// bounded-queue semaphore (TuiSemaphore); the -p path did not.
+//
+// FIX: requests beyond MAX_CONCURRENT WAIT on this semaphore (up to CLAUDE_MAX_QUEUE) instead of
+// being rejected. Only when the queue is ALSO full do we reject — with HTTP 429 + Retry-After
+// (deterministic backpressure), a distinct `concurrency_queue_full` log, and a stats.queueRejections
+// counter that shows up on /health. The slot is released on EVERY exit path via the existing
+// idempotent cleanup() (proc exit/close/error/timeout) — the #37/#40 slot-leak guard.
+const claudeSemaphore = new TuiSemaphore(MAX_CONCURRENT, { maxQueue: CLAUDE_MAX_QUEUE });
+
+// Tagged error so callers can map this single overflow case to HTTP 429 (every OTHER throw stays
+// a 500). Carries retryAfter for the Retry-After header.
+class ConcurrencyOverflowError extends Error {
+  constructor(message) { super(message); this.name = "ConcurrencyOverflowError"; this.httpStatus = 429; this.retryAfter = CLAUDE_QUEUE_RETRY_AFTER; }
+}
+
+// Acquire a -p concurrency slot, queuing if all are busy (up to CLAUDE_MAX_QUEUE). Resolves to a
+// release() fn that MUST be called exactly once on every exit path (wired into ctx.cleanup()).
+// Rejects with ConcurrencyOverflowError when the wait-queue is full. Increments stats.queued while
+// waiting (decremented on acquire) and stats.queueRejections on overflow.
+async function acquireClaudeSlot() {
+  stats.queued = claudeSemaphore.queued + 1; // reflect this waiter before we (maybe) block
+  try {
+    await claudeSemaphore.acquire();
+  } catch (e) {
+    stats.queued = claudeSemaphore.queued;
+    stats.queueRejections++;
+    logEvent("warn", "concurrency_queue_full", {
+      limit: claudeSemaphore.limit, maxQueue: claudeSemaphore.maxQueue,
+      inflight: claudeSemaphore.inflight, queued: claudeSemaphore.queued,
+    });
+    throw new ConcurrencyOverflowError(
+      `backpressure: concurrency limit (${claudeSemaphore.limit}) reached and wait queue ` +
+      `(${claudeSemaphore.maxQueue}) is full — retry shortly`);
+  }
+  stats.queued = claudeSemaphore.queued;
+  let released = false;
+  return function releaseClaudeSlot() {
+    if (released) return; // idempotent — cleanup() may be reached via multiple proc events
+    released = true;
+    claudeSemaphore.release();
+    stats.queued = claudeSemaphore.queued;
+  };
+}
+
 // SECURITY fail-loud: TUI-mode is incompatible with any configuration that allows
 // non-operator prompts to reach the interactive claude session. Three cases:
 //   1. AUTH_MODE=multi — guest/anonymous keys can submit prompts.
@@ -542,6 +670,8 @@ const stats = {
   sessionHits: 0,
   sessionMisses: 0,
   oneOffRequests: 0,
+  queued: 0,           // current requests waiting for a -p concurrency slot (FIX ⑥)
+  queueRejections: 0,  // total requests rejected with HTTP 429 because the wait-queue was full (FIX ⑥)
 };
 const recentErrors = []; // last 20 errors
 
@@ -769,11 +899,14 @@ function getModelTier(cliModel) {
 // (messagesToPrompt), so multi-turn correctness is preserved without sessions.
 // The sessions Map is retained for stats/logging but no longer drives --resume.
 // Reference: OLP ADR 0009 Amendment 1 + commit 97e7d16.
-function spawnClaudeProcess(model, messages, conversationId, keyName) {
-  if (stats.activeRequests >= MAX_CONCURRENT) {
-    throw new Error(`concurrency limit reached (${stats.activeRequests}/${MAX_CONCURRENT})`);
-  }
-
+// FIX ⑥: concurrency is now bounded by the claudeSemaphore via acquireClaudeSlot(), which the
+// caller MUST await before calling this, passing the resulting release fn as `releaseSlot`. The
+// old `if (activeRequests >= MAX_CONCURRENT) throw` gate (→ opaque 500, uncounted) is GONE: at
+// most MAX_CONCURRENT callers hold a slot when they reach here, so this spawn is always within
+// budget. releaseSlot is wired into the idempotent cleanup() so the slot is freed on EVERY exit
+// path (close/error/timeout/abort). Back-compat: releaseSlot defaults to a no-op so any future
+// internal caller that does its own gating still works.
+function spawnClaudeProcess(model, messages, conversationId, keyName, releaseSlot = () => {}) {
   const cliModel = MODEL_MAP[model] || model;
 
   // Circuit breaker: disabled (see comment at top of breaker section)
@@ -810,7 +943,25 @@ function spawnClaudeProcess(model, messages, conversationId, keyName) {
     env.CLAUDE_CODE_DISABLE_AUTO_MEMORY = "1";
   }
 
-  const proc = spawn(CLAUDE, cliArgs, { env, stdio: ["pipe", "pipe", "pipe"] });
+  // FIX ③ (latency): default-path spawn-home isolation. When a token is resolvable (and the
+  // OCP_SPAWN_REAL_HOME kill-switch is off), run claude under a credential-free minimal HOME
+  // with cwd = that same neutral dir, so it loads NONE of the operator's global ~/.claude
+  // (plugins/skills/hooks) or the ~/ocp project CLAUDE.md/skills — the measured 10–28s → 3–7s
+  // latency win. The env token is authoritative for `-p` (unlike interactive claude). When no
+  // token is resolvable, falls back to real HOME + inherited cwd (zero regression). See
+  // getSpawnHomeMode() / prepareSpawnHome() above. The DISABLE_CLAUDE_MDS / AUTO_MEMORY flags
+  // are set unconditionally in isolated mode (belt-and-braces; mirrors the TUI path).
+  const spawnHome = getSpawnHomeMode();
+  const spawnOpts = { env, stdio: ["pipe", "pipe", "pipe"] };
+  if (spawnHome.isolated) {
+    env.HOME = spawnHome.home;
+    env.CLAUDE_CODE_OAUTH_TOKEN = spawnHome.token; // env token is authoritative for -p
+    env.CLAUDE_CODE_DISABLE_CLAUDE_MDS = "1";
+    env.CLAUDE_CODE_DISABLE_AUTO_MEMORY = "1";
+    spawnOpts.cwd = spawnHome.home; // neutral cwd: no project CLAUDE.md/skills
+  }
+
+  const proc = spawn(CLAUDE, cliArgs, spawnOpts);
   activeProcesses.add(proc);
 
   const t0 = Date.now();
@@ -822,6 +973,10 @@ function spawnClaudeProcess(model, messages, conversationId, keyName) {
     cleaned = true;
     clearTimeout(overallTimer);
     stats.activeRequests--;
+    // FIX ⑥: free the concurrency slot for a queued waiter. releaseSlot is itself idempotent,
+    // and cleanup() is guarded by `cleaned`, so the slot is released exactly once on the first
+    // exit path reached (proc 'exit' fires before 'close'; 'error' covers spawn failure).
+    try { releaseSlot(); } catch { /* never let release throw out of cleanup */ }
   }
 
   // Guarantee slot release on ANY exit path (normal close, error, timeout kill,
@@ -891,12 +1046,18 @@ function spawnClaudeProcess(model, messages, conversationId, keyName) {
 // We accumulate full text across all content_block_delta events plus the
 // assistant-aggregate fallback, then resolve with the assembled string.
 // Reference: OLP ADR 0009 Amendment 1 + commit 97e7d16.
-function callClaude(model, messages, conversationId, keyName) {
+async function callClaude(model, messages, conversationId, keyName) {
+  // FIX ⑥: acquire a concurrency slot first (queues up to CLAUDE_MAX_QUEUE; rejects with a
+  // ConcurrencyOverflowError → 429 when the queue is full). The release fn is passed into the
+  // spawn so the idempotent cleanup() frees it on every exit path. If the spawn itself throws
+  // synchronously (before cleanup is wired), release here so the slot never leaks.
+  const releaseSlot = await acquireClaudeSlot();
   return new Promise((resolve, reject) => {
     let ctx;
     try {
-      ctx = spawnClaudeProcess(model, messages, conversationId, keyName);
+      ctx = spawnClaudeProcess(model, messages, conversationId, keyName, releaseSlot);
     } catch (err) {
+      releaseSlot();
       return reject(err);
     }
 
@@ -1063,14 +1224,28 @@ function startHeartbeat(res, intervalMs, sessionId) {
 // We parse line-by-line and forward content_block_delta text events as SSE.
 // The result event triggers the stop/[DONE] sequence.
 // Reference: OLP ADR 0009 Amendment 1 + commits 97e7d16, 65f945c.
-function callClaudeStreaming(model, messages, conversationId, res, authInfo = {}) {
+async function callClaudeStreaming(model, messages, conversationId, res, authInfo = {}) {
   const id = `chatcmpl-${randomUUID()}`;
   const created = Math.floor(Date.now() / 1000);
 
+  // FIX ⑥: acquire a concurrency slot first (queues up to CLAUDE_MAX_QUEUE). On overflow, surface
+  // HTTP 429 + Retry-After (NOT 500). Release is wired into cleanup() for every exit path; if the
+  // spawn throws synchronously before cleanup is wired, release here.
+  let releaseSlot;
+  try {
+    releaseSlot = await acquireClaudeSlot();
+  } catch (err) {
+    if (err instanceof ConcurrencyOverflowError) {
+      return jsonResponse(res, 429, { error: { message: sanitizeError(err.message), type: "rate_limit_error" } }, { "Retry-After": String(err.retryAfter) });
+    }
+    return jsonResponse(res, 500, { error: { message: sanitizeError(err.message), type: "proxy_error" } });
+  }
+
   let ctx;
   try {
-    ctx = spawnClaudeProcess(model, messages, conversationId, authInfo.keyName);
+    ctx = spawnClaudeProcess(model, messages, conversationId, authInfo.keyName, releaseSlot);
   } catch (err) {
+    releaseSlot();
     return jsonResponse(res, 500, { error: { message: sanitizeError(err.message), type: "proxy_error" } });
   }
 
@@ -1263,12 +1438,23 @@ function sanitizeError(msg) {
 }
 
 // ── Response helpers ────────────────────────────────────────────────────
-function jsonResponse(res, status, data) {
+function jsonResponse(res, status, data, extraHeaders = null) {
   if (res.headersSent || res.writableEnded || res.destroyed) return;
-  res.writeHead(status, { "Content-Type": "application/json" });
+  // extraHeaders is optional + additive (e.g. Retry-After on a 429); Content-Type always wins.
+  res.writeHead(status, { ...(extraHeaders || {}), "Content-Type": "application/json" });
   res.end(JSON.stringify(data));
 }
 
+// FIX ⑥: map an upstream error to the right HTTP response. A ConcurrencyOverflowError (the
+// wait-queue was full) becomes HTTP 429 + Retry-After + rate_limit_error; every other error
+// stays a 500 proxy_error (byte-for-byte the pre-fix behaviour for non-overflow errors).
+function respondUpstreamError(res, err) {
+  if (err instanceof ConcurrencyOverflowError) {
+    return jsonResponse(res, 429, { error: { message: sanitizeError(err.message), type: "rate_limit_error" } }, { "Retry-After": String(err.retryAfter) });
+  }
+  return jsonResponse(res, 500, { error: { message: sanitizeError(err.message), type: "proxy_error" } });
+}
+
 function sendSSE(res, data, hb) {
   hb?.reset();
   res.write(`data: ${JSON.stringify(data)}\n\n`);
@@ -1688,7 +1874,9 @@ function applySettingUpdate(key, value) {
 
   switch (key) {
     case "timeout":          TIMEOUT = value; break;
-    case "maxConcurrent":    MAX_CONCURRENT = value; break;
+    // FIX ⑥: keep the -p wait-queue semaphore's limit in sync with the runtime MAX_CONCURRENT
+    // so a /settings change to maxConcurrent actually changes how many claude procs run at once.
+    case "maxConcurrent":    MAX_CONCURRENT = value; claudeSemaphore.limit = Math.max(1, value); break;
     case "sessionTTL":       SESSION_TTL = value; break;
     case "maxPromptChars":   MAX_PROMPT_CHARS = value; break;
     case "cacheTTL":         CACHE_TTL = value; break;
@@ -1897,7 +2085,7 @@ async function handleChatCompletions(req, res) {
         try { res.end(); } catch {}
         return;
       }
-      return jsonResponse(res, 500, { error: { message: sanitizeError(err.message), type: "proxy_error" } });
+      return respondUpstreamError(res, err);
     }
   }
 
@@ -1914,8 +2102,9 @@ async function handleChatCompletions(req, res) {
       try { res.end(); } catch {}
       return;
     }
-    // Sanitize error: strip internal file paths before sending to client
-    jsonResponse(res, 500, { error: { message: sanitizeError(err.message), type: "proxy_error" } });
+    // Sanitize error: strip internal file paths before sending to client.
+    // FIX ⑥: ConcurrencyOverflowError → 429 + Retry-After; all other errors → 500 (unchanged).
+    respondUpstreamError(res, err);
   }
 }
 
@@ -2076,6 +2265,31 @@ const server = createServer(async (req, res) => {
       circuitBreaker: "disabled",
       sessions: sessionList,
       recentErrors: recentErrors.slice(-5),
+      // ── FIX ③ spawn-home isolation surface — ADDITIVE (default -p/stream-json path) ──
+      // Lets the operator confirm the latency-fix isolation is active without inspecting logs.
+      // NEVER includes the token. mode: "isolated-scratch-home" | "real-home". home is the
+      // scratch HOME path when isolated (null otherwise). For TUI_MODE the -p path is unused,
+      // so report it as disabled.
+      spawn: (() => {
+        if (TUI_MODE) return { mode: "tui (default -p path unused)", isolated: false, home: null };
+        const shm = getSpawnHomeMode();
+        return {
+          mode: shm.isolated ? "isolated-scratch-home" : "real-home",
+          isolated: shm.isolated,
+          home: shm.isolated ? shm.home : null,
+          reason: shm.reason,
+        };
+      })(),
+      // ── FIX ⑥ -p concurrency wait-queue surface — ADDITIVE ──
+      // inflight/queued are live; queueRejections is cumulative (also in stats.queueRejections).
+      // Lets the operator see backpressure instead of guessing from opaque 500s.
+      concurrency: {
+        maxConcurrent: MAX_CONCURRENT,
+        maxQueue: claudeSemaphore.maxQueue,
+        inflight: claudeSemaphore.inflight,
+        queued: claudeSemaphore.queued,
+        queueRejections: stats.queueRejections,
+      },
       // ── TUI observability (audit C-5) — ADDITIVE block (ADR 0007 PR-B amendment) ──
       // /health is a grandfathered B.2 endpoint (ADR 0006). This block is NEW fields only;
       // every existing field above is byte-identical → behaviour-preserving for existing
@@ -2364,7 +2578,7 @@ server.listen(PORT, BIND_ADDRESS, () => {
   console.log(`Architecture: on-demand spawning (no pool)`);
   console.log(`Models: ${MODELS.map((m) => m.id).join(", ")}`);
   console.log(`Claude binary: ${CLAUDE}`);
-  console.log(`Timeout: ${TIMEOUT / 1000}s | Max concurrent: ${MAX_CONCURRENT}`);
+  console.log(`Timeout: ${TIMEOUT / 1000}s | Max concurrent: ${MAX_CONCURRENT} | Queue: ${CLAUDE_MAX_QUEUE} (429 on overflow)`);
   console.log(`Circuit breaker: disabled`);
   console.log(`Tools: ${SKIP_PERMISSIONS ? "all (skip-permissions)" : ALLOWED_TOOLS.join(", ")}`);
   console.log(`Sessions: TTL=${SESSION_TTL / 1000}s`);
@@ -2376,6 +2590,15 @@ server.listen(PORT, BIND_ADDRESS, () => {
   if (NO_CONTEXT) console.log(`Context: suppressed (CLAUDE_NO_CONTEXT=true — no CLAUDE.md, no auto-memory)`);
   if (CACHE_TTL > 0) console.log(`Cache: enabled (TTL=${CACHE_TTL / 1000}s)`);
   else console.log(`Cache: disabled (set CLAUDE_CACHE_TTL to enable)`);
+  // FIX ③: announce default-path (-p/stream-json) spawn-home isolation mode (never logs the token).
+  if (!TUI_MODE) {
+    const shm = getSpawnHomeMode();
+    if (shm.isolated) {
+      console.log(`Spawn home: isolated-scratch-home (${shm.home}, cwd-neutral, env-token auth) — fast path`);
+    } else {
+      console.log(`Spawn home: real-home (${shm.reason}) — set CLAUDE_CODE_OAUTH_TOKEN for the isolated fast path`);
+    }
+  }
   if (TUI_MODE) {
     console.warn(`⚠️  TUI-mode ON — single-user only; do NOT enable on a multi-user OCP (guest prompts would run claude with operator filesystem access). See ADR 0007.`);
     const tuiAuth = process.env.CLAUDE_CODE_OAUTH_TOKEN

test-features.mjs

@@ -1340,23 +1340,12 @@ test("streamStringAsSSE empty content: role + stop + [DONE] only", () => {
 });
 
 // ── Suite: TUI transcript reader ────────────────────────────────────────
-import { encodeCwd, transcriptPath, findTranscriptPath, parseTranscriptLines, isTerminalLine, extractLatestAssistantText, verifyEntrypoint, detectTuiUpstreamError } from "./lib/tui/transcript.mjs";
+import { findTranscriptPath, parseTranscriptLines, isTerminalLine, extractLatestAssistantText, verifyEntrypoint, detectTuiUpstreamError } from "./lib/tui/transcript.mjs";
 import { readFileSync as tuiReadFileSync, mkdtempSync as tuiMkdtemp0, mkdirSync as tuiMkdir0, writeFileSync as tuiWrite0 } from "node:fs";
 import { tmpdir as tuiTmp0 } from "node:os";
 
 console.log("\nTUI transcript — path formula:");
 
-test("encodeCwd replaces every slash AND every dot with dash", () => {
-  // Verified live (claude v2.1.158): /home/u/.ocp-tui/work -> -home-u--ocp-tui-work
-  assert.equal(encodeCwd("/home/u/.ocp-tui/work"), "-home-u--ocp-tui-work");
-  assert.equal(encodeCwd("/tmp/tui-test"), "-tmp-tui-test"); // dot-free path still correct
-});
-test("transcriptPath composes HOME/.claude/projects/<enc>/<sid>.jsonl", () => {
-  assert.equal(
-    transcriptPath("/home/u", "/home/u/.ocp-tui/work", "abc-123"),
-    "/home/u/.claude/projects/-home-u--ocp-tui-work/abc-123.jsonl"
-  );
-});
 test("findTranscriptPath locates <sid>.jsonl across projects subdirs by UUID", () => {
   const home = tuiMkdtemp0(`${tuiTmp0()}/tui-home-`);
   const sid = "11111111-2222-3333-4444-555555555555";
@@ -1740,7 +1729,7 @@ test("buildTuiCmd shq-escapes a token containing shell metacharacters (no inject
 test("buildTuiCmd OCP_TUI_FULL_TOOLS=1 grants -p-equivalent tool surface (single-user opt-in)", () => {
   const save = { ...process.env };
   const restore = () => {
-    for (const k of ["OCP_TUI_FULL_TOOLS", "CLAUDE_SKIP_PERMISSIONS", "CLAUDE_MCP_CONFIG", "CLAUDE_ALLOWED_TOOLS"]) {
+    for (const k of ["OCP_TUI_FULL_TOOLS", "CLAUDE_MCP_CONFIG", "CLAUDE_ALLOWED_TOOLS"]) {
       if (k in save) process.env[k] = save[k]; else delete process.env[k];
     }
   };
@@ -1752,20 +1741,14 @@ test("buildTuiCmd OCP_TUI_FULL_TOOLS=1 grants -p-equivalent tool surface (single
 
     // gate on: --allowedTools (default set incl Bash), MCP wall dropped
     process.env.OCP_TUI_FULL_TOOLS = "1";
-    delete process.env.CLAUDE_SKIP_PERMISSIONS;
     delete process.env.CLAUDE_MCP_CONFIG;
     delete process.env.CLAUDE_ALLOWED_TOOLS;
     const full = buildTuiCmd("/usr/bin/claude", "m", "s", "/home/u", "cli");
     assert.ok(full.includes("--allowedTools") && full.includes("Bash"), "full-tools grants --allowedTools incl Bash");
     assert.ok(!full.includes("--strict-mcp-config") && !/--disallowedTools/.test(full), "full-tools drops the MCP wall");
-
-    // skip-permissions supersedes --allowedTools
-    process.env.CLAUDE_SKIP_PERMISSIONS = "true";
-    const skip = buildTuiCmd("/usr/bin/claude", "m", "s", "/home/u", "cli");
-    assert.ok(skip.includes("--dangerously-skip-permissions") && !skip.includes("--allowedTools"), "skip-permissions honored");
+    assert.ok(!full.includes("--dangerously-skip-permissions"), "skip-permissions branch is removed (bricks headless TUI)");
 
     // mcp-config threaded through
-    delete process.env.CLAUDE_SKIP_PERMISSIONS;
     process.env.CLAUDE_MCP_CONFIG = "/tmp/mcp.json";
     const mcp = buildTuiCmd("/usr/bin/claude", "m", "s", "/home/u", "cli");
     assert.ok(/--mcp-config '\/tmp\/mcp.json'/.test(mcp), "mcp-config passed through (shq'd)");
@@ -1929,56 +1912,6 @@ test("resolveTuiHome: explicit OCP_TUI_HOME wins regardless of env token (back-c
   assert.equal(resolveTuiHome({ realHome: "/home/u", configuredHome: "/custom/home", envTokenSet: false }), "/custom/home");
 });
 
-// ── resolveTuiEntrypointEnv ───────────────────────────────────────────────
-import { resolveTuiEntrypointEnv } from "./lib/tui/session.mjs";
-
-console.log("\nresolveTuiEntrypointEnv:");
-
-test("mode 'cli' sets CLAUDE_CODE_ENTRYPOINT=cli", () => {
-  const env = {};
-  resolveTuiEntrypointEnv(env, "cli");
-  assert.equal(env.CLAUDE_CODE_ENTRYPOINT, "cli");
-});
-
-test("mode 'cli' overwrites an inherited CLAUDE_CODE_ENTRYPOINT value", () => {
-  const env = { CLAUDE_CODE_ENTRYPOINT: "sdk-cli" };
-  resolveTuiEntrypointEnv(env, "cli");
-  assert.equal(env.CLAUDE_CODE_ENTRYPOINT, "cli");
-});
-
-test("mode 'auto' deletes CLAUDE_CODE_ENTRYPOINT (leaves unset)", () => {
-  const env = {};
-  resolveTuiEntrypointEnv(env, "auto");
-  assert.equal(env.CLAUDE_CODE_ENTRYPOINT, undefined);
-  assert.ok(!Object.prototype.hasOwnProperty.call(env, "CLAUDE_CODE_ENTRYPOINT"));
-});
-
-test("mode 'auto' deletes an inherited CLAUDE_CODE_ENTRYPOINT value", () => {
-  const env = { CLAUDE_CODE_ENTRYPOINT: "sdk-cli" };
-  resolveTuiEntrypointEnv(env, "auto");
-  assert.equal(env.CLAUDE_CODE_ENTRYPOINT, undefined);
-  assert.ok(!Object.prototype.hasOwnProperty.call(env, "CLAUDE_CODE_ENTRYPOINT"));
-});
-
-test("mode 'off' leaves an inherited CLAUDE_CODE_ENTRYPOINT value untouched", () => {
-  const env = { CLAUDE_CODE_ENTRYPOINT: "sdk-cli" };
-  resolveTuiEntrypointEnv(env, "off");
-  assert.equal(env.CLAUDE_CODE_ENTRYPOINT, "sdk-cli");
-});
-
-test("mode 'off' with no inherited value leaves env unchanged", () => {
-  const env = { OTHER: "x" };
-  resolveTuiEntrypointEnv(env, "off");
-  assert.equal(env.CLAUDE_CODE_ENTRYPOINT, undefined);
-  assert.equal(env.OTHER, "x");
-});
-
-test("default mode (no second arg) behaves like 'cli'", () => {
-  const env = { CLAUDE_CODE_ENTRYPOINT: "sdk-cli" };
-  resolveTuiEntrypointEnv(env);
-  assert.equal(env.CLAUDE_CODE_ENTRYPOINT, "cli");
-});
-
 // ── TUI concurrency limiter + drift observability (PR-B: audit C-4 / C-5) ──
 import { TuiSemaphore, recordTuiEntrypoint, buildTuiHealthBlock } from "./lib/tui/semaphore.mjs";
 
@@ -2046,6 +1979,45 @@ await asyncTest("wait queue is bounded — run() rejects with tui_queue_full whe
   assert.equal(sem.inflight, 0);
 });
 
+console.log("\n-p concurrency wait-queue (FIX ⑥ — same TuiSemaphore reused for the -p path):");
+
+// server.mjs reuses TuiSemaphore as `claudeSemaphore = new TuiSemaphore(MAX_CONCURRENT,
+// { maxQueue: CLAUDE_MAX_QUEUE })` and wraps acquire()/release() in acquireClaudeSlot(). These
+// tests assert the contract that the 429-mapping depends on: requests beyond the limit QUEUE
+// (not reject), only an overflow past the queue rejects (→ HTTP 429 in server.mjs), and a
+// released slot is reusable (the #37/#40 slot-leak guard — no leak on normal completion).
+await asyncTest("FIX ⑥: requests beyond MAX_CONCURRENT queue, not reject (limit=1, queue=1)", async () => {
+  const sem = new TuiSemaphore(1, { maxQueue: 1 });   // mirrors CLAUDE_MAX_CONCURRENT=1, CLAUDE_MAX_QUEUE=1
+  const g1 = deferred();
+  const inflightP = sem.run(async () => { await g1.p; });   // request 1 — holds the only slot
+  await new Promise((r) => setImmediate(r));
+  assert.equal(sem.inflight, 1, "req1 inflight");
+  const queuedP = sem.run(async () => {});                  // request 2 — WAITS (queued), does NOT reject
+  await new Promise((r) => setImmediate(r));
+  assert.equal(sem.queued, 1, "req2 queued (waits), not rejected → would be served, not 429");
+  // request 3 — queue full → reject (server.mjs maps this single case to 429 + Retry-After)
+  await assert.rejects(sem.run(async () => {}), /tui_queue_full|queue/, "req3 overflows → reject (→429)");
+  g1.resolve();
+  await inflightP; await queuedP;
+  assert.equal(sem.inflight, 0, "all slots released after drain (no leak)");
+  assert.equal(sem.queued, 0, "queue fully drained");
+});
+
+await asyncTest("FIX ⑥: slot released on normal completion is immediately reusable (no #37/#40 leak)", async () => {
+  const sem = new TuiSemaphore(1, { maxQueue: 16 });   // mirrors default CLAUDE_MAX_QUEUE=16
+  for (let i = 0; i < 5; i++) {
+    await sem.run(async () => { /* a normal, completing turn */ });
+    assert.equal(sem.inflight, 0, `slot released after turn ${i}`);
+  }
+  // Prove the limit still binds after many acquire/release cycles.
+  const g = deferred();
+  const held = sem.run(async () => { await g.p; });
+  await new Promise((r) => setImmediate(r));
+  assert.equal(sem.inflight, 1, "limit still enforced after reuse cycles");
+  g.resolve(); await held;
+  assert.equal(sem.inflight, 0);
+});
+
 console.log("\nTUI drift observability (C-5):");
 
 test("recordTuiEntrypoint: observed 'cli' is NOT a mismatch and sets lastEntrypoint", () => {