Commit Graph
3 Commits
Author SHA1 Message Date
taodengandClaude Fable 5 6848f9751c docs(plans): TUI streaming is not achievable — prereq spike result + honest README constraints
Backlog #2 of docs/plans/2026-07-13-tui-latency demanded a prereq spike before any
streaming design: does the transcript JSONL grow during a turn, or only at the end?
The spike was run. All three candidate sources are dead:

  (a) transcript JSONL — grows at EVENT granularity; the assistant's text event is
      written as ONE complete line, ~0.3s before the terminal turn_duration event
      (observed: turn_duration 7319ms; text event at t+7.0s, terminal at t+7.3s).
  (b) tmux capture-pane — the pane is a RENDERED view, not the text. Same turn,
      transcript T = '## Semaphore\n\nA **semaphore** is a synchronization…'
      pane        = '⏺ Semaphore' / '  A semaphore is a synchronization…'
      '## ', '**' and ```-fences are absent from the pane entirely (rendered to ANSI,
      then stripped by capture-pane -p). T.startsWith(paneText) is FALSE both raw and
      indent-stripped — not on redraw, but on essentially every markdown answer.
      capture-pane -e recovers styling, never source spelling: no unique inverse.
  (c) --debug-file — byte-exact ('last_assistant_message':'## Title\n\n**alpha…'),
      but only inside end-of-turn Stop-hook payloads; zero content_block_delta /
      text_delta events; ~2.7MB per turn.

--output-format stream-json, the only interface emitting token deltas, requires -p —
the metered-billing path TUI mode exists to avoid (cc_entrypoint=sdk-cli). The
constraint is structural. OCP's TUI SSE is, and remains, replay-only.

Also corrects this plan's own "~20s waiting for the whole turn" decomposition, which
was inferred from an external 30-32s report and never measured through OCP. Measured
through a real OCP instance (TUI, claude-sonnet-4-6, n=5): median 11.30s before #156,
9.55s after, vs a native turn_duration of ~7.3s → OCP's own overhead is ~2-4s, not
~20s. The remainder is generation time, which streaming would not shorten (it moves
the first byte, not the last) — so a consumer needing the COMPLETE answer, which is
the JSON-card case that motivated this work, would have gained nothing from streaming.

Backlog #4 measured while here: --exclude-dynamic-system-prompt-sections gives ZERO
marginal benefit (TTFT median 6.39s vs 6.17s for --effort low alone, n=5, one worse
outlier). Do not adopt. Banner stayed on Claude Max.

README: documents the ~6s TTFT floor plainly (TUI mode cannot serve interactive-latency
consumers) and states that no-token-streaming is structural rather than a missing feature.

No code change. No version bump (docs-only). Not endpoint-touching: no server.mjs diff,
so no cli.js citation applies.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VqgWJcjxrjjL9L9SkpZyXR
2026-07-13 15:32:41 +10:00
6854075c01 docs(plans): TUI-mode latency floor — measured decomposition + backlog (#155)
* docs(plans): TUI-mode latency floor — measured decomposition + backlog

An external consumer measured OCP's prompt path at TTFT p50 30-32s and excluded
OCP on that basis. This documents where those 30 seconds actually go, with a
reproducible harness (n=15) that bypasses OCP and measures the underlying
subscription path's true first-token time.

Findings:
- boot -> input-ready is only ~1.0s; it is NOT the bottleneck
- true TTFT is 6-10s; the remaining ~20s is runTuiTurn polling the transcript
  until turn_duration (ADR 0007 step 4) — i.e. waiting for the WHOLE turn.
  There is no streaming.
- buildTuiCmd never passes --effort, so the spawned claude inherits the
  operator's global effortLevel (xhigh on this host) — every request runs
  extended thinking. Passing --effort low: TTFT p50 9.70s -> 6.17s (-36%),
  spread 7.85-13.07s -> 5.87-6.44s. Stays on Claude Max.
- ⚠️ --bare SILENTLY drops off the subscription pool (banner flips
  'Claude Max' -> 'API Usage Billing'). It does cut boot to ~0.5s, but defeats
  the entire purpose of ADR 0007. Failure is silent: all 5 --bare samples
  produced no answer at all (no error, no crash, just never a token).
  Anyone optimizing boot MUST diff the banner line.
- Floor after all fixes is ~6s (claude always injects the full CC system prompt
  + tool definitions). TUI mode therefore cannot serve real-time consumers —
  a constraint worth stating in the README.

Backlog ranked by value/effort: (1) OCP_TUI_EFFORT env var, default low;
(2) real streaming instead of turn_duration polling (~20s, the big one);
(3) warm pane pool (~1s); (4) prefill trim (probably not worth it).

Docs-only; no version bump (matches repo convention — bump lands in the
chore(release) commit).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Dx5Ncq6wWBrF27vJKHZ9Hr

* docs(plans): address review — restore --bare evidence, qualify effort claim, add banner captures

Reviewer (fresh-context, Iron Rule 10) returned REQUEST_CHANGES. All four technical
conclusions survived independent verification (source-read + live repro); the defects
were in the evidence file, and they were real:

- H-1: measurements.jsonl claimed n=15 but held 10 rows, and the --bare group — the
  basis of this PR's headline warning — had ZERO rows. The author had stripped them
  as 'invalid samples' (ttft_ms:-1) when they were in fact the evidence. Regenerated:
  n=15, three groups × 5, all with tag/extra_args. --bare reproduces exactly (5/5 no
  answer, boot 0.43-0.45s).
- M-1: the effort-inheritance claim was written unconditionally, but it depends on
  resolveTuiHome()'s mode. Real-home (current service config) inherits the operator's
  effortLevel: xhigh; env-token scratch home (~/.ocp-tui/home) has no effortLevel in
  its settings.json and prepareTuiHome() never writes one, so the pane gets claude's
  built-in default. Now documented as a table — and the mode split makes passing
  --effort explicitly MORE valuable, not less.
- M-2: baseline rows were produced by a pre-parameterized script and lacked
  tag/extra_args. Re-run with the committed script. Recomputed effect: -40% (was -36%).
- L-1: documented that the harness suppresses OCP's periodic kill-server tick via the
  othersRemain coexistence guard (by design, resumes next tick).
- L-2: documented that floor.sh's readiness marker differs from OCP's tuiInputReady(),
  so the ~1.0s boot figure is not apples-to-apples with BOOT_MS.
- Direct-API reference figure now explicitly labeled as external (not in this dataset).
- New: billing-banner.txt captures all three configs live, including confirmation that
  --effort low stays on Claude Max (reviewer noted this was asserted but unevidenced).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Dx5Ncq6wWBrF27vJKHZ9Hr

* docs(plans): scope the effort claim to TUI mode (currently off), drop nonexistent bin/

Re-review (APPROVE_WITH_MINOR) caught two accuracy defects:
- MIN-1: 'every OCP request runs extended thinking' over-extrapolated. TUI mode is
  currently OFF on this host (CLAUDE_TUI_MODE=false; /health tui.enabled=false), so
  live traffic takes the -p path. The claim is about what happens WHEN TUI mode is
  enabled — now scoped, and the same qualifier applied to the kill-server interaction
  note (that reap tick is itself gated on TUI_MODE).
- NIT-2: the quoted grep included bin/, which does not exist in the repo (exit 2).
  Dropped; the zero-hit result over lib/ + server.mjs is unchanged.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Dx5Ncq6wWBrF27vJKHZ9Hr

---------

Co-authored-by: dtzp555 <dtzp555@gmail.com>
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
2026-07-13 14:22:17 +10:00
cd98b51b96 docs(plans): add anthropic-only sandbox strategy handoff (#102)
Forward-looking planning doc capturing prior-art analysis from OLP's
Phase 7 PR-B re-evaluation, scoped down to OCP's single-provider
(anthropic) deployment.

Documents:
- Multi-tenant gap for OCP (cross-key lateral read, OAuth exposure)
- Why OLP's outer-bwrap PR-B approach is the wrong path to copy
  (Anthropic design intent, ~/.claude.json upstream not-planned)
- Three viable alternatives:
  A. Ephemeral $HOME via env var (~50 LOC, recommended Phase 1)
  B. bwrap --tmpfs $HOME + ro-bind credentials (apt dep, Linux only)
  C. OverlayFS lowerdir+upperdir (needs CAP_SYS_ADMIN)
- Orthogonal cross-key isolation layer (per-spawn customConfig denyRead
  or per-OS-user spawning)
- Trust-tier framing (single-user / family-zone / shared-host)

Not an ADR — becomes one only when work actually starts. Not binding;
ALIGNMENT.md authority requirements still apply when sandbox code lands.

Cross-references OLP's parallel multi-provider work at
dtzp555-max/olp ADR 0014 Amendment 1 (pending) and archive branch
phase-7-pr-b-outer-bwrap-snapshot.

Co-authored-by: dtzp555 <dtzp555@gmail.com>
Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>
2026-05-31 09:21:40 +10:00