OLP — Open LLM Proxy

A personal- and family-scale multi-provider LLM proxy. One HTTP endpoint, many subscriptions behind it, automatic routing, automatic fallback, content-addressed caching — so your IDEs and family clients keep working as long as any of your subscriptions has quota left.

Status: v0.1.1 shipped (2026-05-25) — Phase 1 multi-provider proxy core + cleanup. Phase 2 (multi-key auth, lib/keys.mjs) is currently in progress per ADR 0007. Sections marked placeholder land alongside the relevant phase of work (see phase plan).

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Why OLP

On 2026-05-14, Anthropic announced (effective 2026-06-15) that claude -p, the Agent SDK, and third-party agent traffic move out of the Pro/Max subscription pool into a separate fixed monthly Agent SDK Credit pool. OCP, OLP's predecessor, was a proxy around a single CLI — its core assumption was "subscription = unlimited within rate limits". That assumption breaks for Anthropic on the effective date.

The structural response is to stop relying on one provider's subscription terms remaining favourable. OLP spreads risk across multiple providers whose subscriptions still include CLI/programmatic use, routes intelligently between them, and caches aggressively so every request that does spawn a CLI counts.

OLP is not: a commercial multi-tenant SaaS; an enterprise gateway competing with LiteLLM / OpenCode / CLIProxyAPI on breadth; a model-capability router ("route to the smartest model" — you pick the model); a conversation-state store (your client handles that).

See ALIGNMENT.md for OLP's constitution and docs/adr/ for the founding ADRs.

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Quick Start

placeholder — lands with Phase 1.

Anticipated shape:

# install
npm install -g @dtzp555-max/olp

# run setup (writes ~/.olp/config.json, asks which providers to enable)
olp setup

# start the proxy (default port 3456 — same as OCP if you migrate)
olp start

# point your IDE at http://localhost:3456/v1/chat/completions with the OLP API key from `olp keys list`.

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Supported Providers

Source of truth: models-registry.json. This table is regenerated from the registry per the release_kit overlay; do not edit it out of sync.

OLP distinguishes Candidate Providers (declared as intended, not yet pinned) from Enabled Providers (authority pin filled + plugin landed + Phase audit passed). The v0.1 founding commit ships zero Enabled Providers — enablement is a Phase audit deliverable, not a bootstrap claim. See ALIGNMENT.md § Provider Inventory for the transition gate.

Candidate Providers

Provider key	CLI	Subscription / auth	Anticipated Tier	Anticipated Phase
anthropic	claude -p	Pro / Max OAuth (pre-2026-06-15); Agent SDK Credit pool after	D (re-eval post-2026-06-15)	Phase 1
openai	codex exec --json	ChatGPT Pro OAuth or API key	D	Phase 2
mistral	vibe --prompt --output json	Le Chat Pro API key	D	Phase 3
grok	grok -p --output-format streaming-json	xAI Build xai-... API key	C	Phase 8+
kimi	kimi -p --output-format stream-json	Moonshot Kimi API key	C	Phase 8+
minimax	TBD	MiniMax Token Plan (¥29+/mo)	B	Phase 8+
glm	TBD	Zhipu Coding Plan ($10+/mo)	B	Phase 8+
qwen	TBD	Alibaba Coding Plan ($50/mo)	B	Phase 8+

Risk tier guide. D = permissive / safe (eligible for default-enabled); C = tightening signal, no enforcement history (opt-in); B = service-level key revocation risk (opt-in + consent); A = excluded by default (cannot be opt-in enabled). Tier B providers prompt for explicit consent on first enable and record consent in ~/.olp/config.json. See ALIGNMENT.md § Risk Tier Framework.

Excluded by default (Tier A — evidence-backed, pending primary-source pin). Google Antigravity. See ADR 0006 for the named-prohibition + no-cost-advantage + reinstatement-friction rationale, and for the primary-source pinning follow-up that may force a Tier reconsideration if the Google FAQ language cannot be sourced within 90 days of 2026-05-23.

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Configuration

placeholder — full configuration reference lands with Phase 4 (fallback engine).

OLP reads its config from ~/.olp/config.json. The minimum useful shape:

{
  "routing": {
    "chains": {
      "<requested-model>": [
        { "provider": "<key>", "model": "<provider-model-id>" },
        { "provider": "<key>", "model": "<provider-model-id>" }
      ]
    },
    "soft_triggers": {
      "<provider-key>": { "<trigger>": <threshold> }
    }
  }
}

Note: routing.soft_triggers thresholds are parsed and stored but have no runtime effect at v0.1 — the quota polling path (quotaStatus() per hop) is deferred to v1.x per ADR 0004 Amendment 2. The evaluation logic exists and is tested; only the production data ingestion path is deferred.

Trigger types, fallback safety, idempotency rules, and the full example config land here when Phase 4 ships. See ADR 0004 (Fallback Engine Semantics & Safety) for the design.

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API Endpoints

placeholder — full table lands as each endpoint lands.

Endpoint	Method	Phase	Status	Description
/v1/chat/completions	POST	1	✅ Shipped	OpenAI-compatible Chat Completions entry. Internally normalized to IR, dispatched to a provider plugin, response shape converted back.
/v1/models	GET	1	✅ Shipped	Lists models from models-registry.json.
/health	GET	1	✅ Shipped	Per-provider health snapshot (owner-only).
/cache/stats	GET	5	📋 Planned	Cache hit rate, by-provider breakdown.
/v0/management/quota	GET	6	📋 Planned	Per-provider quota / credit pool status (best-effort).
/dashboard	GET	6	📋 Planned	Owner-only dashboard (localhost-bound by default).

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Environment Variables

placeholder — full table lands per-phase as variables are introduced.

Variable	Default	Description
OLP_PORT	3456	HTTP listener port.
OLP_CLAUDE_BIN	claude (from PATH)	Override path to the claude binary (Anthropic provider). Useful when multiple claude installs are present.
OLP_CODEX_BIN	codex (from PATH)	Override path to the codex binary (OpenAI provider).
OLP_VIBE_BIN	vibe (from PATH)	Override path to the vibe binary (Mistral provider).

Per-provider auth env vars

These variables configure credential discovery for each provider plugin. Setting the correct one for your provider is usually required for OLP to make successful requests.

Anthropic (claude -p)

Variable	Default behavior	Description
CLAUDE_CODE_OAUTH_TOKEN	Searches ~/.claude/.credentials.json first, then macOS keychain (darwin only)	Directly supplies the OAuth access token. Highest-precedence override; bypasses all credential-discovery logic. Useful in CI/headless environments where the keychain is unavailable.

OpenAI Codex (codex exec --json)

Variable	Default behavior	Description
OPENAI_CODEX_AUTH_PATH	~/.codex/auth.json (or $CODEX_HOME/auth.json)	Overrides the full path to the Codex auth artifact. When set, no other path is tried; missing or malformed file returns null (no auth). Useful for CI test fixtures.
CODEX_HOME	~/.codex	Overrides the Codex home directory. $CODEX_HOME/auth.json becomes the default auth path. Ignored when OPENAI_CODEX_AUTH_PATH is set explicitly.

Mistral Vibe (vibe --prompt)

Variable	Default behavior	Description
MISTRAL_API_KEY	Reads $VIBE_HOME/.env (default ~/.vibe/.env)	Directly supplies the Mistral API key. Highest-precedence override per DOCS-2; bypasses .env file lookup.
MISTRAL_VIBE_AUTH_PATH	~/.vibe/.env (or $VIBE_HOME/.env)	Overrides the full path to the Vibe .env auth file. Evaluated only when MISTRAL_API_KEY is not set. When set, no other path is tried; missing or malformed file returns null (no auth).
VIBE_HOME	~/.vibe	Overrides the Vibe home directory. $VIBE_HOME/.env becomes the default auth path. Ignored when MISTRAL_API_KEY or MISTRAL_VIBE_AUTH_PATH is set explicitly.

📋 Planned (Phase 2) — not yet read by the codebase:

• OLP_HOME (~/.olp) — Config, providers, keys, cache, logs root. Currently hardcoded to ~/.olp/config.json in loadFallbackConfigSync; the env override path is a Phase 2 config-layer deliverable.
• OLP_LOG_LEVEL (info) — Log level filter (error/warn/info/debug). logEvent currently writes unconditionally; level filtering is a Phase 2 observability deliverable.

See also the Implementation status table.

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Response Headers

Every response served through OLP carries:

• X-OLP-Provider-Used: <provider-key> — which provider's plugin served the request. On a chain-exhausted response, this identifies the chain's configured primary entry (chain[0]), not necessarily the first hop where spawn() was invoked — see ADR 0004 Amendment 6 for the v0.1 chain-origin semantics and the v1.x soft-trigger reactivation note.
• X-OLP-Model-Used: <model-id> — which model the served provider used.
• X-OLP-Fallback-Hops: <n> — number of fallback hops (0 if served by the primary chain entry).
• X-OLP-Cache: hit | miss | bypass — cache layer outcome.
• X-OLP-Latency-Ms: <ms> — end-to-end latency observed at the proxy.

If a fallback chain is exhausted, X-OLP-Fallback-Exhausted lists the tried providers in order.

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Implementation status (as of 2026-05-25)

Phase 1 is closed at v0.1.1 (multi-provider proxy core + pre-Phase-2 cleanup). Phase 2 (multi-key auth, lib/keys.mjs) is in progress per ADR 0007. This table reflects what is currently shipped vs. what is designed for later phases.

File / artifact	Status	Notes
server.mjs	✅ Shipped	HTTP listener + dispatcher
lib/ir/	✅ Shipped	IR definition + serializers (ADR 0003)
lib/providers/anthropic.mjs	✅ Shipped	claude -p spawn-binary plugin
lib/providers/codex.mjs	✅ Shipped	codex exec --json plugin
lib/providers/mistral.mjs	✅ Shipped	vibe --prompt plugin
lib/cache/keys.mjs	✅ Shipped	Content-addressed key computation
lib/cache/store.mjs	✅ Shipped	In-memory Map (file-backed layout: 📋 Phase 2 storage adapter)
lib/fallback/engine.mjs	✅ Shipped	Trigger evaluation + chain advancement (ADR 0004)
Soft trigger data path (quotaStatus() polling)	📋 Planned (v1.x)	Evaluation logic shipped + tested; data ingestion deferred per ADR 0004 Amendment 2
models-registry.json	✅ Shipped	SPOT for (provider, model) metadata
test-features.mjs	✅ Shipped	Comprehensive test suite covering IR, cache, fallback, and integration paths (CI: test.yml)
lib/keys.mjs	🟡 Phase 2 — core + server integration (D44 + D45)	Multi-key auth core (createKey / validateKey / listKeys / revokeKey / touchLastUsed) per ADR 0007 §§ 5/6.1/6.3/6.3.5/6.4/9.4 + loadAuthConfigSync for auth.allow_anonymous (default false). Server wires validateKey per request, filters chain by providers_enabled, fires touchLastUsed post-response. D46 will add owner-vs-guest gating for /health + X-OLP-Fallback-Detail.
lib/audit.mjs	🟡 Phase 2 — shipped at D45	Append-only ndjson audit at ~/.olp/logs/audit.ndjson per ADR 0007 § 6.2 + § 8. appendAuditEvent fires for every /v1/* request (success, 401, 403, 5xx). Warn + 1 retry on append failure; no memory buffer at Phase 2 (forward path). PII excluded (no message / response content). OLP_HOME env override supported for test/operator isolation.
dashboard.html	📋 Planned (Phase 6)	Owner-only multi-provider dashboard
docs/provider-caveats.md	📋 Planned (Phase 3+)	Lossy-translation reference; for now documented inline in each plugin header
docs/openai-spec-pin.md	✅ Shipped (D30)	OpenAI spec snapshot for annual audit; v0.1 baseline pinned 2026-05-24
docs/alignment-audits/	📋 Planned	Output directory for annual alignment audits (first audit: 2027-05-14)
scripts/migrate-from-ocp.mjs	📋 Planned (Phase 7)	OCP → OLP migration tool
setup.mjs	📋 Planned	Setup wizard / initial config

Known limitations

Behaviors that work correctly at personal/family scale but have ratified follow-ups for a v1.x sprint. Single landing page: docs/v1x-roadmap.md.

• Streaming-path singleflight not implemented. The cache layer's D4 singleflight (one spawn per identical concurrent request) is fully wired on the buffered path but NOT on the streaming path. N concurrent identical streaming requests at v0.1 will each spawn their own CLI process. Design ratified in ADR 0005 Amendment 8; implementation tracked via issue #16 and v1.x roadmap #1. At family scale this is observably fine — every caller still receives the correct response; the cost is N CLI processes instead of one.

• Soft triggers configured but inert. routing.soft_triggers in ~/.olp/config.json is honored by the engine's evaluation logic but quotaStatus() polling is not wired (ADR 0004 Amendment 2). A startup warning fires if the field is non-empty so the inert state is visible.

• Multi-key auth shipped through server integration (D45); owner gating pending D46. lib/keys.mjs core (createKey / validateKey / listKeys / revokeKey / touchLastUsed) shipped at D44; server.mjs now invokes validateKey per request, filters the chain by providers_enabled, fires touchLastUsed post-response, and appends an audit row to ~/.olp/logs/audit.ndjson for each /v1/* request. The owner-vs-guest gating for /health payload trimming and X-OLP-Fallback-Detail header suppression is scheduled D46. Phase 2 in progress through D46 (owner gating), D47+ (keygen CLI surface, docs), Phase 2 close → v0.2.0. Tracked in v1.x roadmap #2.

  New env vars consumed at D45: OLP_HOME (override ~/.olp/ location, used by tests + operator deployments); OLP_OWNER_TOKEN (synthetic env-owner identity for headless / CI deployments — bypasses filesystem manifest lookup with stable __env_owner__ keyId).

  New config block consumed at D45: config.json auth.{ allow_anonymous, owner_only_endpoints, fallback_detail_header_policy }. Default allow_anonymous: false (production-off); set true to accept requests without an OLP API key (development / single-user dev mode). Startup emits a warn when allow_anonymous: true so the relaxed posture is observable.

• Provider-level cacheKeyFields mask not implemented. Cache keys include every IR field including ones individual plugins drop at spawn (e.g., Anthropic plugin drops temperature). Spurious cache misses possible (extra spawn cost; never spurious hits). Conservative posture documented in ADR 0005 Amendment 7. Tracked in v1.x roadmap #5.

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Architecture

OLP is a Node.js (ESM, .mjs) HTTP proxy with no build step and minimal dependencies. The high-level shape:

• Entry surface — server.mjs handles /v1/chat/completions and the administrative endpoints. Governed by OpenAI's /v1/chat/completions specification as the wire authority. See ALIGNMENT.md § Authorities.
• Intermediate Representation (IR) — lib/ir/ normalizes between the entry surface and provider-native shapes. The IR is the lingua franca; any extension is an ADR 0003 amendment.
• Provider plugins — lib/providers/<name>.mjs. Each plugin implements the contract in ADR 0002 (Plugin Architecture for Providers), spawns its CLI, and translates between IR and provider-native IO.
• Cache layer — lib/cache/ is a content-addressed cache keyed on the 11-field tuple defined in ADR 0005 § "Cache key composition (v1.0)" (provider, model, messages, tools, temperature, response_format, cache_control, max_tokens, top_p, stop, tool_choice — as of Amendment 2/D15). Per-key isolation, prompt-caching bypass, chunked stream replay, and singleflight. See ADR 0005 (Cache Layer Cross-Provider Design). Current backing store is an in-memory Map; file-backed storage is planned for Phase 2.
• Fallback engine — lib/fallback/ advances a configured chain one provider at a time on configured triggers, never retrying after the first response chunk has been emitted to the client. See ADR 0004.
• Multi-key auth — lib/keys.mjs (📋 planned, Phase 2) will carry OCP's per-OLP-key namespace isolation forward. Each OLP API key will have independent quota, cache namespace, and audit log; each key declares which providers it can access.

Read the ADRs in docs/adr/ in order before proposing structural changes.

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Phase plan

OLP lands in phases. Each phase has its own PR series and Iron-Rule-10 reviewer; this README's placeholders are filled per-phase via the release_kit overlay.

The original v0.1 spec (in ~/.cc-rules/memory/projects/olp_v0_1_spec.md on the maintainer's workstations) planned one provider plugin per phase. The actual Phase 1 execution bundled the three Tier-D provider plugins + cache layer + fallback engine into a single shipped milestone (v0.1.0) followed by a cleanup batch (v0.1.1). The phase numbering below reflects what was actually shipped, not the original per-plugin partition.

• Phase 0 — Repo bootstrap, ALIGNMENT.md, founding ADRs, CI workflows, PR template. ✅ Shipped (2026-05-23).
• Phase 1 — Multi-provider proxy core: server.mjs, IR, three Tier-D provider plugins (Anthropic / OpenAI Codex / Mistral Vibe), cache (D1+D4) + cleanup (D2 bypass / D3 chunked replay / D23 size cap), fallback engine with first-chunk safety + hard triggers + per-hop log observability, IR↔OpenAI translation under Rule 2(b). ✅ Shipped — v0.1.0 (2026-05-24) + v0.1.1 cleanup (2026-05-25, D35–D42).
• Phase 2 — Multi-key auth (lib/keys.mjs) per ADR 0007: opaque OLP API keys, per-key cache namespacing (the data model already supports this — only the keyId source is missing), owner-vs-guest tier for header gating, audit ndjson, owner-only gating for /health + X-OLP-Fallback-Detail (D40 follow-up). (current — ADR drafting at D43-B).
• Phase 3 — Dashboard (dashboard.html) + audit query layer (deferred from Phase 2). Owner-only multi-provider quota panels, fallback rate, cache hit rate; localhost-bound by default.
• Phase 4+ — v1.x roadmap items as triggered. Full deferred-work tracker: docs/v1x-roadmap.md. Includes streaming-path singleflight (issue #16 + ADR 0005 Amendment 8 design ratified), soft-trigger reactivation (ADR 0004 Amendment 2), /health activeSpawns integration, provider-level cacheKeyFields mask, streaming-path SPAWN_FAILED salvage.
• Phase N (opt-in) — Tier-2 / Tier-C provider plugins (Grok / Kimi / MiniMax / GLM / Qwen) per ADR 0006; provider-native protocol endpoints; deterministic triggers. Triggered by tier-2 demand, not on the bootstrap path.

Full spec (decision rationale, open questions, risks): ~/.cc-rules/memory/projects/olp_v0_1_spec.md on the maintainer's workstations. Phase 2 kickoff handoff: ~/.cc-rules/memory/handoffs/2026-05-25-phase-2-kickoff.md.

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Migration from OCP

placeholder — scripts/migrate-from-ocp.mjs lands with Phase 7 (📋 planned, not yet authored).

Anticipated user-facing flow (target: <5 minutes):

1. Stop OCP (launchctl bootout the OCP service or ocp stop).
2. Install OLP.
3. Run olp migrate-from-ocp — copies ~/.ocp/keys/ to ~/.olp/keys/ and points provider plugins at OCP's existing auth artifacts where applicable.
4. Start OLP. Clients pointing at port 3456 keep working; their existing OLP API keys remain valid.

OCP's cache directory is not migrated: OLP's cache key format includes provider+model and warms cold naturally. OCP enters maintenance mode (stability fixes only) when OLP v0.1 ships; new development happens in OLP.

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License

MIT.

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Acknowledgements

OLP evolved from OCP (Open Claude Proxy). OCP's per-key isolation model, cache-layer design (D1–D4), dashboard, and alignment-constitution discipline are all carried forward. The structural generalization from single-CLI to multi-provider is what makes this a new project rather than an OCP minor version — see ALIGNMENT.md § Reference: How OCP's cli.js discipline maps to OLP.

Authors: project maintainer (with AI drafting assistance).