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Garry Tan 943105f109 v1.91.8.0 test: smaller suite, derived paid selection, retired never-green evals (#2994) 
* test: delete test-infrastructure dead code (G)

- exit-propagation drives the runner's real strict verdict
  (BunTestOutputClassifier + strictTestExitCode); delete the unused
  shardRunLooksTruncated predicate.
- delete skill-coverage-matrix registry + its gate (nothing reads it; the
  floor already iterates skillCensus()).
- delete touchfiles-facade export-parity tests (Bun fails missing imports
  at link time) and the duplicated E2E_TIERS tier-value test.
- delete brain-cache-spec TRANSPORT_DEFAULT_POLICY, SKILL_RUN_RETENTION_DAYS
  and the now-unused BrainTrustPolicy type with their literal tests.
  AUTOPLAN_PREFLIGHT_BUDGET_BYTES stays: skill-preflight-budget enforces it
  against real resolver output.
- delete audit-compliance's JSDoc-comment grep.

* test: replace product tests that fake the product with real-boundary tests (F)

- design: serve.test.ts drove an inline mirror server; now two tests run the
  real serve() on an ephemeral port (reload confinement, submit exit 0).
- setup-gbrain: rollback + voyage tests execute the template-extracted init
  blocks (3 sites) instead of drifted local bash copies.
- terminal-agent: internalHandler source greps replaced by a behavioral
  /internal/grant + /internal/revoke auth matrix (no/wrong/valid token).
- /health: server-security-surface and the server-auth / security-audit-r2 /
  sidebar-tabs source greps fold into one liveness-only check on the real
  body; the L4 sidecar wiring gets a behavioral /pty-inject-scan test.
- delete tautologies (browser-manager onDisconnect, memory-command #12),
  ios swiftui tap fixture self-check, memory-ingest put_page grep, detach
  source greps, sidebar-agent absence pins, dead-CSS pins + the dead CSS,
  security-audit-r2 Task 1 + the test-only meta-commands re-export,
  duplicate generated-SKILL.md checks.
- make-pdf coverage-gaps cases move into their owner test files.

* test: delete tests of dead eval code (A)

- A1: the retired Eng lexical oracle (evaluateEngSeedCoverage,
  isEngSeedDecisionAUQ), the completion-handoff detector and the retained
  corpus had no paid caller since v1.87.6; delete their 26 replay files,
  ~2.6k helper LOC and fixtures, and the dead blocks in 8 mixed files
  (live hasNativePlanTerminal / batching assertions stay).
- A2: dead viewport approvers in autoplan-artifact-permission and their 11
  replay files + fixtures; recorder/launcher cases stay.
- A3: never-wired oracles and seeders (autoplan-phase-order,
  eng-finding-fixture, ceo-paired-fixture, design-ui-scope,
  plan-skill-completion, pty-current-screen, required-reads,
  transcript-section-logger); plan-seed-submission now decodes through the
  production createPtyScreen; section manifests name their actual guard.
- A4: zero-reference helper exports, plus execGit and invokeAndObserve
  found by the reachability pass.
- 52 fixtures orphaned by the deletions; touchfile and selection-table
  entries for every deleted path.

* test: clean up the paid eval lane (B1-B4, B6, B7)

- B1: delete paid files that assert nothing or cannot pass meaningfully:
  skill-llm-eval-spec and skill-e2e-spec-execute (test.todo), gemini-e2e
  (+ gemini-session-runner; no gemini CLI in CI), ship-idempotency (red
  since v1.63), the two opus-4-7 *-sonnet overlay wrappers, conductor-prose
  (+ its source-evaluation replay), codex-e2e-plan-format; drop their keys,
  scripts and census rows.
- B2: skill-llm-eval grades browse/sections/command-list.md with one union
  judge that also carries the baseline score pin; regression-vs-baseline
  deleted (paid run: pass, c4/c4/a4).
- B3: memory-pipeline, ios-qa, ios-qa-swift-build and plan-tune-cathedral
  make no model calls; renamed out of the paid glob so they run on every
  PR. Swift builds need GSTACK_TEST_SWIFT=1; device stub deleted.
- B4: codex-e2e*, outside-voice, aside and ios-device cannot run in the CI
  image; excluded from the weekly lane with a tracked re-entry condition.
- B6: fold opus-47's negative routing controls into skill-routing-e2e
  journey-negatives (paid run: 3/3 unrouted) and delete the file.
- B7: delete the never-green brain-privacy-gate eval; a free
  gstack-skill-start test now proves consent precedes artifacts egress.

* test: retire the finding-count cluster and trim its helpers (C)

- C0/C1: the five never-green evals (skill-e2e-autoplan-chain and
  skill-e2e-plan-{ceo,eng,design,devex}-finding-count) failed on harness and
  budget, never on skill behavior; delete them, their touchfile/tier ids,
  AUTOPLAN_CHAIN_BUDGET and the dedicated eighth periodic slice (--slices 7).
- C2: delete the helper groups whose only paid consumers were those files
  (11 modules), trim claude-pty-runner and eng-seeded-coverage to the paid
  closure, and delete the free replay tests whose assertions exercised only
  that dead code (89 files, 135 orphaned fixtures). Blocks that used dead code
  only as input for a live subject keep their assertions: the multiSelect
  default moved to plan-review-decisions, runner PTY tests use inline caller
  policies, and the timer-safe budget checks moved to eng-finding-retry-budget.
- The eight production-touching files stay except ceo-current-decision-record
  (its template read only feeds the retired counter).
- CARVE_GUARDS.autoplan is behavioral 'none'; TODOS records the lost chain
  and per-finding cadence coverage with their re-entry tests.

* test: fold per-incident replay series into their detector owners (D)

Twelve detector families move into one owner test each: 73 incident files
become describe blocks in ceo-section-loading-fixture (stale-fill race),
model-overlays, coverage-audit-evidence, autoplan-phase-observer,
native-auto-decide, outside-voice-evidence, eng-first-review,
plan-count-completion, plan-count-file-permission, ceo-mode-option,
plan-scope-selection and plan-count-prerequisite. Each block keeps its original
code and fixture, so every case still runs; only tests asserting the incident
file's own touchfile registration are dropped (41). Touchfile lists that named
an incident now name its owner.

* test: start the plan-count history PTY on its readiness marker (H)

The fake CLI prints a startup marker and the runner waits for it instead of the
fixed 8 s startup sleep (8.6 s -> 0.9 s locally). eng-semantic-terminal's
sleeping registration cases went with C; plan-count-timeout keeps the fixed wait
because it asserts deadline behavior.

* test: derive paid touchfiles from each eval's static closure (E)

touchfiles.test.ts now checks, per key, that the paid file's static
test/helpers and test/fixtures closure (plus fixture paths it names in string
literals) is covered, and names the file, path, chain and key to fix when it is
not. Free *.test.ts files are no longer touchfiles, so editing a free replay
test stops selecting paid evals: 950 entries removed, 653 real closure paths
added. The hand-copied inventories go: periodic-fixture-selection,
fake-impeccable-touchfiles and 45 per-file selection examples. Selection for
the sample edits (plan-eng-review template, claude-pty-runner,
plan-count-fixture, gstack-config) loses no case under either profile.
CONTRIBUTING documents the rule and its lower bound.

* test: skip hollow tier shards and census judges in the paid planner (B5)

A paid file is now skipped for a tier lane only when every E2E id it registers
is known statically and none has that tier; ids come from the touchfile
registrations and literal testName/*IfSelected arguments, so a comment or
skill path that quotes another id cannot unschedule it, and computed names
keep today's scheduling. --list and the manifest show each skip as
"skipped: no E2E_TIERS id has tier <tier>". The weekly gate census drops the
LLM judges (--skip-judges); they still run in the periodic census and PR gate
lanes. Gate lane 52 -> 42 files, census 41; periodic 77 -> 69.

* test: run seven paid evals on the current default capture model (B8)

skill-e2e-{auq-matrix,plan-format,qa-bugs,retro,workflow} pinned
claude-opus-4-7 and skill-e2e-office-hours plus -brain-writeback pinned
claude-sonnet-4-6; none tests a historical model, so they now capture with
resolveEvalModel('capture'), and the free harness tests that execute these
registrations receive the same resolver. The paid re-pin run passed all of
them. skill-e2e-{design,office-hours-phase4,plan-prosons,plan} keep
claude-opus-4-7: six of their cases failed on the default model (three
timeouts, a missing report file, a format miss and a posture score of 3), so
per the plan's fallback they keep their pins with a TODOS entry. The pre-spend
estimate and drop threshold are in docs/test-audit-2026-09.md.

* test: guard the reduced suite against new test-of-test files

- test/test-of-test-ratchet.test.ts records the 228 free tests that import only
  test/ code and fails on a new one, naming the owner test to extend instead;
  a stale baseline entry fails with the remove instruction.
- test/helpers/resolve-repo-path.ts is the one specifier/literal resolver for
  the ratchet and the touchfile closure invariant, with its own unit tests.
- CONTRIBUTING "Test tiers" describes the paid-failure workflow (fix, then one
  row in the detector's owner test) and the ratchet; TEST_PORTFOLIO gains the
  detector -> owner-test table and no longer claims an Autoplan chain eval.
- TODOS: automatic exclusion policy for chronically red periodic files (P3),
  the deferred native-completion table collapse, the unused CEO payment
  seeder; the PTY readiness item is narrowed to the paid runner.
- docs/test-audit-2026-09.md collects the triage, security mapping, inventories,
  selection proof, behavior-commit decisions and retained false positives.

* v1.91.8.0 test: smaller suite, derived paid selection, retired never-green evals

Release metadata for the test-reduction branch: VERSION 1.91.8.0 (1.91.7.0 is
claimed by #2983), CHANGELOG with the measured before/after table and a
contributor section, durations re-recorded on Ubicloud standard-16 (857 files,
0 failures), the agents digest, CONTRIBUTING's after-measurement row, the B8
fallback TODOS entry, and the after metrics, kept-vs-plan notes, B8 run and
census estimate in docs/test-audit-2026-09.md.

* fix(ubicloud): skip retrieval globs that match nothing instead of reporting a failed pull

* test: count issue-numbered Design findings in the UI-scope gate eval
2026-09-29 08:58:49 -07:00

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# Browser / sidebar / server internals
> **Scope:** this is the internals reference for gstack's own browser engine — the `browse` daemon, GStack Browser, the sidebar extension. That engine is the automatic **fallback** when the Aside browser is not installed or not running (Linux, Windows, a closed Aside app); Aside is what every skill drives first. The Aside contract lives in `scripts/resolvers/aside.ts` and [BROWSER.md](../BROWSER.md).
Moved verbatim from CLAUDE.md (token-load reduction). These are the
load-bearing invariants for `browse/src/server.ts`, the Chrome extension,
the sidebar PTY, SSE endpoints, CDP sessions, and the sidebar security
stack. Every rule here is additionally pinned by a CI tripwire test named
in its paragraph.
**Sidebar architecture:** Before modifying `sidepanel.js`, `background.js`,
`content.js`, `terminal-agent.ts`, or sidebar-related server endpoints,
read `docs/designs/SIDEBAR_MESSAGE_FLOW.md`. The sidebar has one primary
surface — the **Terminal** pane (interactive `claude` PTY) — with
Activity / Refs / Inspector as debug overlays behind the footer's
`debug` toggle. The chat queue path was ripped once the PTY proved out;
`sidebar-agent.ts` and the `/sidebar-command` / `/sidebar-chat` /
`/sidebar-agent/event` endpoints are gone. The doc covers the WS auth
flow, dual-token model, and threat-model boundary — silent failures
here usually trace to not understanding the cross-component flow.
**Embedder terminal-agent ownership** (v1.42.1.0+, identity-based kill v1.44.0.0+).
`buildFetchHandler` in `browse/src/server.ts` accepts `ServerConfig.ownsTerminalAgent?:
boolean` (default `true`). When `true`, factory shutdown acquires
`acquireAgentStateLock(stateDir)` and checks daemon ownership. It removes
`terminal-port`, `terminal-internal-token`, and the matching `terminal-agent-pid`
record only when the recorded agent is absent, already dead, or confirmed stopped
by `stopAgentByRecord`. Uncertain identity or exit, an unavailable lock, or
successor-owned daemon state leaves those files intact.
Embedders (e.g. the gbrowser phoenix overlay) that pre-launch their own PTY
server must pass `false` so their discovery files survive gstack teardown cycles.
The flag is the third caller-owned teardown gate in `ServerConfig` (alongside
`xvfb?` and `proxyBridge?`); polarity is inverted (explicit bool vs presence) and
documented in the field's JSDoc. CLI `start()` always passes `true` explicitly —
the static-grep test in `browse/test/server-embedder-terminal-port.test.ts` fails
CI if a refactor drops it. Pre-v1.44 used `pkill -f terminal-agent\.ts` (regex
match) which would kill sibling gstack sessions on the same host; the new
`browse/test/terminal-agent-pid-identity.test.ts` static-grep tripwire fails CI
if any source file re-introduces `pkill ... terminal-agent` or `spawnSync('pkill', ...)`.
**WebSocket auth uses Sec-WebSocket-Protocol, not cookies.** Browsers
can't set `Authorization` on a WebSocket upgrade, but they CAN set
`Sec-WebSocket-Protocol` via `new WebSocket(url, [token])`. The agent
reads it, validates against `validTokens`, and MUST echo the protocol
back in the upgrade response — without the echo, Chromium closes the
connection immediately. `Set-Cookie: gstack_pty=...` is kept as a
fallback for non-browser callers (the cross-port `SameSite=Strict`
cookie path doesn't survive from a chrome-extension origin).
**Cross-pane PTY injection.** The toolbar's Cleanup button and the
Inspector's "Send to Code" action both pipe text into the live claude
PTY via `window.gstackInjectToTerminal(text)`, exposed by
`sidepanel-terminal.js`. No `/sidebar-command` POST — the live REPL is
the only execution surface in the sidebar now.
**`/health` MUST NOT surface any token — and it no longer does** (v1.63+).
The historical headed-mode leak of `AUTH_TOKEN` is fixed: `GET /health` is
liveness/status only in every mode. Token bootstrap is `POST /extension-token`,
which validates the caller's Origin against the pinned extension identity
(the `key` field in `extension/manifest.json` pins the extension ID —
`GSTACK_EXTENSION_ID` in `browse/src/server.ts`, derivation reproducible via
`bun browse/scripts/extension-id.ts`) plus a loopback Host. PTY auth still
flows through `POST /pty-session` only. Don't add any token to `/health`.
**Transport-layer security** (v1.6.0.0+). When `pair-agent` starts an ngrok tunnel,
the daemon binds two HTTP listeners: a local listener (127.0.0.1, full command
surface, never forwarded) and a tunnel listener (locked allowlist: `/connect`,
`/command` with a scoped token + 26-command browser-driving allowlist,
`/sidebar-chat`). ngrok forwards only the tunnel port. Root tokens over the tunnel
return 403. SSE endpoints use a 30-minute HttpOnly `gstack_sse` cookie minted via
`POST /sse-session` (never valid against `/command`). Tunnel-surface rejections go
to `~/.gstack/security/attempts.jsonl` via `tunnel-denial-log.ts`. Before editing
`server.ts`, `sse-session-cookie.ts`, or `tunnel-denial-log.ts`, read
[ARCHITECTURE.md](../ARCHITECTURE.md#dual-listener-tunnel-architecture-v1600) —
the module boundary (no imports from `token-registry.ts` into `sse-session-cookie.ts`)
is load-bearing for scope isolation.
**Unicode sanitization at server egress** (v1.38.0.0+). Every server egress that
ships page-content-derived strings MUST go through `JSON.stringify(payload,
sanitizeReplacer)` for object payloads or `sanitizeLoneSurrogates(body)` for text
bodies. Lone UTF-16 surrogate halves from CDP page content otherwise reach the
Anthropic API as `\uD800`-style escapes and trigger a 400. Wired at four egress
points today: `handleCommandInternal` (HTTP + batch via a sanitizing wrapper around
`handleCommandInternalImpl`) and both SSE producers (`/activity/stream`,
`/inspector/events`). Post-stringify regex is a no-op — `JSON.stringify` has
already escaped the surrogate before regex could match, so the replacer must run
inside the encoding pipeline. Before adding a new SSE/WebSocket writer or HTTP
response in `server.ts`, read
[ARCHITECTURE.md](../ARCHITECTURE.md#unicode-sanitization-at-server-egress-v13800).
`browse/test/server-sanitize-surrogates.test.ts` pins the wiring with invariant
tests, so bypasses fail CI.
**SSE endpoint helper** (v1.51.0.0+). New SSE endpoints in `server.ts` MUST route
through `createSseEndpoint(req, config)` from `browse/src/sse-helpers.ts`. The
helper owns the cleanup contract (abort + enqueue-throw + heartbeat-throw, all
idempotent) and bakes in `sanitizeLoneSurrogates` on every JSON.stringify, so
new subscribers can't accidentally regress either invariant. Inline
`ReadableStream` wiring leaked subscribers when the TCP connection died without
firing `req.signal.abort` (Chromium MV3 service-worker suspend, intermediate
proxy half-close). `/activity/stream`, `/inspector/events`, and `/memory`
(SSE-eligible) all route through it. `browse/test/sse-helpers.test.ts` pins the
cleanup contract.
**CDP session lifecycle** (v1.51.0.0+). Direct `page.context().newCDPSession(page)`
calls outside `browse/src/cdp-bridge.ts` fail CI via the static-grep tripwire in
`browse/test/cdp-session-cleanup.test.ts`. Use `withCdpSession(page, async (s) => {...})`
for one-shot CDP work (try/finally detach) or `getOrCreateCdpSession(page, cache)`
for cached sessions tied to a page's lifetime (close-detach via `Map<page, session>`).
Three sites migrated: cdp-bridge frame events, write-commands archive capture,
cdp-inspector. The helpers prevent the per-session leak class where successful-path
detach happened but error-path detach was missed.
**Setup symlink hardening** (v1.38.0.0+). Every link site in `setup` MUST route
through the `_link_or_copy SRC DST` helper near the `IS_WINDOWS` detection. On
Windows without Developer Mode, plain `ln -snf` produces frozen file copies that
don't refresh on `git pull` — silent staleness across every host adapter. The
helper preserves `ln -snf` on Unix and switches to `cp -R` / `cp -f` on Windows.
`test/setup-windows-fallback.test.ts` enforces a static invariant: a single raw
`ln` call outside the helper body fails CI. Windows users get a one-line note
from `_print_windows_copy_note_once` reminding them to re-run `./setup` after
every `git pull`.
**Sidebar security stack** (layered defense against prompt injection):
| Layer | Module | Lives in |
|-------|--------|----------|
| L1-L3 | `content-security.ts` | server + read path — datamarking, hidden element strip, ARIA regex, URL blocklist, envelope wrapping |
| L4 | `security-classifier.ts` (TestSavantAI ONNX) | **security sidecar subprocess only** (`security-sidecar-entry.ts`, driven by `security-sidecar-client.ts` from server.ts) |
| Canary | `security.ts` (generate/inject/detect) | pure utilities — no production injector today (the chat prompt-builder that injected them was ripped) |
| Combiner | `security.ts` (combineVerdict + THRESHOLDS) | pure, tested; retains transcript/deberta vote handling for LayerSignal inputs no live layer produces anymore |
History note: an L4b Haiku transcript classifier and an opt-in DeBERTa ensemble
(`GSTACK_SECURITY_ENSEMBLE=deberta`) existed until the chat-path agent that
invoked them was ripped; both were deleted as dead code (zero production
callers). Do not re-document them as live.
**Critical constraint:** `security-classifier.ts` CANNOT be imported from the
compiled browse binary. `@huggingface/transformers` v4 requires `onnxruntime-node`
which fails to `dlopen` from Bun compile's temp extract dir — hence the sidecar
subprocess. Only `security.ts` (pure-string operations — canary utilities,
verdict combiner, status) is safe for `server.ts`. See
`~/.gstack/projects/garrytan-gstack/ceo-plans/2026-04-19-prompt-injection-guard.md`
§"Pre-Impl Gate 1 Outcome" for the original architectural decision.
**Thresholds** (in `security.ts`): `BLOCK: 0.85`, `WARN: 0.75`, `LOG_ONLY: 0.40`,
`SOLO_CONTENT_BLOCK: 0.92` (label-less content classifiers can't distinguish
"injection" from "phishing aimed at the user", so their solo bar is higher).
The live L4 path applies these in server.ts's sidecar-scan handling; canary
leak always BLOCKs (deterministic).
**Env knobs:**
- `GSTACK_SECURITY_OFF=1` — emergency kill switch. Classifier stays off even if
warmed; the L1-L3 filters keep running.
- Classifier model cache: `~/.gstack/models/testsavant-small/` (112MB, first run only)
- Attack log: `~/.gstack/security/attempts.jsonl` — written by
`tunnel-denial-log.ts` (tunnel-surface rejections; rotates at 10MB, 5 generations)
History note (#2557): the cross-process session state
(`~/.gstack/security/session-state.json`), `getStatus()`, the `/health`
`security` field, and the sidepanel SEC shield were all removed — the state
file lost its only writer when sidebar-agent.ts was ripped, so the shield
reported a permanent 'inactive' or a stale false-green 'protected' from
leftover disk state. The live defenses (L1-L3 filters, L4 sidecar on the
inject-scan path) report through their own call sites, never through
/health. `browse/test/extension-token.test.ts` pins the removal on the real
/health body and `browse/test/pty-inject-scan.test.ts` pins the live L4
wiring behaviorally. Do not re-document these as live.
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