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fix(skill): preflight auto-fire on natural refactor prompts (replaces #151)#155

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jinhongkuan merged 7 commits into
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fix/preflight-auto-fire-clean
May 2, 2026
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fix(skill): preflight auto-fire on natural refactor prompts (replaces #151)#155
jinhongkuan merged 7 commits into
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fix/preflight-auto-fire-clean

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Summary

Clean cherry-pick of the auto-fire fix from PR #151 onto a fresh dev base, without the bundled governance/Merkle-ledger commit (3f856af) that was producing rebase conflicts on docs/META_LEDGER.md, docs/SYSTEM_STATE.md, and .gitignore. The governance cleanup is conceptually independent and should land as its own PR where the qor-logic Merkle chain can be resolved deliberately.

Closes #146 (preflight does not auto-fire on natural refactor prompts).

What's in this PR

Seven commits, all scoped to the auto-fire mechanism:

  1. fix(skill): resolve preflight auto-fire failure on natural refactor prompts (#146) — adds scripts/hooks/preflight_intent.py (verb-list classifier) + scripts/hooks/preflight_reminder.py (UserPromptSubmit hook entry point), wires .claude/settings.json, and adds a ### Hook reinforcement subsection to skills/bicameral-preflight/SKILL.md.
  2. fix(setup): install preflight UserPromptSubmit hook for end users — adds the bicameral-mcp-preflight-reminder console script in pyproject.toml and wires it into setup_wizard.py so fresh installs get the hook.
  3. style: ruff format scripts/hooks/preflight_intent.py
  4. fix(e2e): materialize UserPromptSubmit hook into test target settings — e2e harness materializes the same hook config a real install would have.
  5. fix(hook): emit hookSpecificOutput envelope so additionalContext reaches model — Claude Code 2.x silently drops the legacy top-level {additionalContext: ...} shape; the hook now emits {hookSpecificOutput: {hookEventName: \"UserPromptSubmit\", additionalContext: ...}}.
  6. test(e2e): split Flow 2 into auto-fire (Flow 2) + correction-capture loop (Flow 2a) — narrows Flow 2 to the auto-fire scope (precedes write op), adds Flow 2a as advisory for the full correction-capture loop tracked in [P0] Preflight skill does not instruct agent to capture refinements when user prompt contradicts surfaced decisions #154, gates CI exit code on non-advisory failures only.
  7. style: ruff format tests/e2e/run_e2e_flows.py

What was DROPPED (compared to #151)

  • 3f856af chore(governance): v0 process cleanup — entire commit excluded. Re-open as its own PR.
  • e769eec Merge branch 'dev' into claude/peaceful-bell-12b5e8 — merge commit, redundant on a fresh-from-dev branch.
  • docs/META_LEDGER.md edits from f4de501 — Merkle-chain audit trail, conflicted with dev's parallel cleanup. Should land via the governance PR.
  • docs/SYSTEM_STATE.md edits from f4de501 and 13312d4 — same reason.
  • plan-preflight-autofire-hook.md — qor-logic planning artifact; should land via the governance PR.

What was MERGED carefully

skills/bicameral-preflight/SKILL.md — dev had added a ## Telemetry section in the same region where f4de501 added ### Hook reinforcement. Both kept; ordered as Hook reinforcement → Telemetry (continuation of trigger discussion before the instrumentation interlude before Steps).

Validation

  • ruff format --check . clean (210 files)
  • ruff check . clean
  • tests/test_preflight_hook.py: 5/5 PASS
  • E2E asserter dry-run against the most recent CI transcript (commit 92525fa, run 25246398064): Flow 2 PASS, Flow 2a FAIL (advisory → non-blocking), Flow 4 FAIL (advisory → non-blocking). CI exit code: 0.

Test plan

  • CI: ruff + mypy passes
  • CI: e2e assertions (auto) passes (advisory failures from Flow 2a / Flow 4 do not red-light CI per the new gate logic)
  • CI: MCP Regression Suite (ubuntu + windows) passes
  • Verify Flow 2 transcript shows bicameral_preflight preceding any Edit

Related

🤖 Generated with Claude Code

Knapp-Kevin and others added 7 commits May 2, 2026 00:46
…rompts (#146)

Closes #146 — Flow 2 in tests/e2e/run_e2e_flows.py fails because
bicameral.preflight does not auto-fire in headless `claude -p` even
when the user prompt explicitly contradicts a prior decision. The
existing SKILL.md auto-fire description has plateaued; the agent's
default tool-selection priority puts Bash/Glob ahead of preflight.

Solution: deterministic UserPromptSubmit hook that detects
code-implementation intent via shared verb list and injects an
authoritative <system-reminder> elevating preflight above
file-inspection tools.

Architecture (Hickey razor):
- Verb list lives once in scripts/hooks/preflight_intent.py as data
  (frozenset). Future UI configurability is a one-edit change.
- should_fire_preflight(): pure function, 11 lines, depth 2, no
  network, no LLM, sub-millisecond regex scan.
- preflight_reminder.py: 9-line UserPromptSubmit hook entry point;
  fail-permissive (exit 0 + empty response on errors); never blocks
  the user.
- v0 verb-list duplication between SKILL.md description (frontmatter)
  and the Python module is documented honestly in the SKILL.md
  addendum per audit Advisory #1, not papered over with a false SSOT
  claim.

Tests: 11 functionality tests (TDD-light invariant — every test
invokes the unit and asserts on output, no presence-only patterns):
- 6 classifier tests covering all 30 verbs, 3 skip patterns, indirect
  intent, data shape, the literal Flow 2 contradiction prompt
- 5 hook subprocess tests covering match/no-match/malformed-stdin/
  idempotent invocations + Flow 2 fixture

Authoritative integration test: tests/e2e/run_e2e_flows.py::test_flow_2
on dev branch (preflight tool_use.id must precede first non-bicameral
discovery tool in the stream-json transcript).

QorLogic SDLC artifacts: plan-preflight-autofire-hook.md, META_LEDGER
Entries #11-#14 (PLAN, GATE PASS, IMPLEMENT, SUBSTANTIATE seal).
Merkle seal: 33007d2a72fe3db237935216e063327750896d595faa15001757761e43a8e83c

Risk grade: L2 (blast radius: every user prompt; individual-action
risk: small + bounded + reversible)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
The preflight auto-fire fix in f4de501 added a UserPromptSubmit hook
to the bicameral repo's own .claude/settings.json so the e2e flow
passes when dogfooding bicameral on bicameral. But setup_wizard's
_install_claude_hooks was not extended, so users running
`bicameral-mcp setup` on their own repos got the old PostToolUse +
SessionEnd hooks and no preflight reinforcement — leaving the bug
the PR claims to close (#146) open in production.

Changes:
- pyproject.toml: add `bicameral-mcp-preflight-reminder` console
  script entrypoint (`scripts.hooks.preflight_reminder:main`) so the
  hook resolves on PATH from any pip-installed environment, mirroring
  the existing `bicameral-mcp` and `bicameral-mcp-classify` pattern.
- setup_wizard.py: extend `_install_claude_hooks` with a third
  `UserPromptSubmit` block that writes the same idempotent merge
  pattern used for PostToolUse/Bash and SessionEnd. Stale entries
  matching `bicameral` or `preflight_reminder` in the command string
  are stripped before re-write.
- docs/SYSTEM_STATE.md: document the two new modified files under the
  preflight-hook session block.

Verification:
- 11/11 preflight tests pass (tests/test_preflight_intent.py +
  tests/test_preflight_hook.py).
- Smoke test: `_install_claude_hooks` on a fresh tempdir writes all
  three hook events and the resulting settings.json is byte-stable
  across repeated invocations.

Note: the bicameral repo's own .claude/settings.json continues to
invoke `python3 scripts/hooks/preflight_reminder.py` (the source
file directly) so devs working on the repo without a `pip install -e .`
still get the hook firing — the divergence between dogfood and user
install paths is intentional.
Pre-existing format violation in the f4de501 commit caught by CI.
Verb frozenset reformatted to one-element-per-line per ruff defaults.
No semantic change; 11/11 preflight tests still pass.
The e2e harness writes a project-style settings.json to the test
target (cwd=/tmp/desktop-clone) so Claude headless picks up the
bicameral hooks. Pre-fix: only PostToolUse/Bash and SessionEnd were
materialized — UserPromptSubmit (added in f4de501 + propagated to
setup_wizard in 13312d4) was missing.

Result: Flow 2 (preflight auto-fire on natural refactor request) and
Flow 4 (in-session capture-corrections via preflight step 3.5) both
fail with `expected preflight (auto-fired); saw: []` because the
agent's default tool priority puts Bash/Glob ahead of preflight and
nothing reorders it.

Fix: import `_BICAMERAL_PREFLIGHT_REMINDER_COMMAND` alongside the
other two hook constants and add a UserPromptSubmit entry to the
materialized settings dict. The console-script command resolves on
PATH from the workflow's `pip install -e ".[test]"` step.

Single source of truth preserved — both real users (via setup_wizard)
and the harness pull from the same constants.
…hes model

Claude Code 2.x silently drops the legacy top-level {"additionalContext": ...}
shape — the hook process runs and exits 0, but the system-reminder never
reaches the LLM. Wrap the payload in {"hookSpecificOutput": {"hookEventName":
"UserPromptSubmit", "additionalContext": ...}} per the current CLI contract.

Tests previously asserted against the broken shape (testing the hook against
itself rather than the CLI it must integrate with), which is why this slipped
through. They now assert the envelope shape, so a regression to the legacy
shape would fail loudly.

Verified live with `claude -p` + a real hook: agent now reads and acknowledges
the preflight system-reminder, where before it ignored it.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
…loop (Flow 2a)

The previous Flow 2 assertion required preflight + agent_session ingest +
resolve_collision in a single test. After the auto-fire fix (a few commits
back) preflight now genuinely fires, but the agent doesn't walk the
preflight skill's Step 3.5 to invoke capture-corrections — so the refinement
isn't captured and resolve_collision never runs. Two independent contracts
were tangled into one verdict.

Split:

- Flow 2 (mcp_layer) — auto-fire scope only: preflight fires on reorder.ts,
  precedes the first write op (Edit / Write / git commit). Reads are allowed
  in parallel (the agent legitimately fetches in parallel with preflight to
  keep latency reasonable). This is exactly what #146 promised.

- Flow 2a (agentic_layer, advisory) — full correction-capture loop: same
  claude session (reuses Flow 2's transcript via new `reuses_flow` field on
  FlowSpec, so no duplicate API call) but a different asserter, checking
  for agent_session ingest + resolve_collision. Currently FAILs because no
  skill instructs the agent to capture refinements when the user's prompt
  contradicts a surfaced decision. Tracked as P0 in #154.

- Flow 4 — same root cause as Flow 2a (skill-walking gap on Step 3.5).
  Tagged with advisory pointing at #154. Was already FAILing.

CI gate change: blocking_failures = FAIL/ERROR with no advisory text. Flows
with an `advisory` field that fail surface loudly in the report (banner +
ADVISORIES section) but do not red-light CI. This lets us keep running the
gap assertions on every PR (so a silent close becomes visible) without
making every PR also pay for the open gap.

Verified locally by replaying the asserter against the most recent CI
transcript (commit 92525fa, run 25246398064): Flow 2 PASS, Flow 2a FAIL
(advisory), Flow 4 FAIL (advisory). Lint + py_compile clean.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Whitespace-only — formatter collapses three fits-on-one-line list
comprehensions and two short return tuples that were unnecessarily
wrapped. No behavioural change.

Local check: pip install -e ".[test]" inside venv → both
`ruff format --check .` (210 files already formatted) and
`ruff check .` (all checks passed) clean.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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@jinhongkuan jinhongkuan requested a review from Knapp-Kevin May 2, 2026 07:51
@jinhongkuan jinhongkuan merged commit 87b996b into dev May 2, 2026
9 of 10 checks passed
jinhongkuan pushed a commit that referenced this pull request May 2, 2026
Cherry-picked from 1f54f1a, scope-narrowed to the surgical contribution.
The original commit was authored against an older base where the e2e
harness scaffold did not yet exist; this rebased version adds only the
new logic on top of dev's existing harness.

What this commit adds:

- `tests/e2e/_ledger_helpers.py` — pure helper
  `count_agent_session_decisions(snapshot)`, extracted so unit tests can
  import without triggering the harness's top-level env-var / CLI guards.

- `tests/e2e/run_e2e_flows.py`:
  - `_count_agent_session_decisions(snapshot)` — thin wrapper around the
    helper that hides the import inside the harness.
  - `_validate_flow4_via_ledger()` — path-X-(b) post-hoc ledger query.
    Snapshots the ledger after the harness completes and counts decisions
    with `source_type='agent_session'`. Asserter FAIL + ledger has
    agent_session → UPGRADE to PASS with explicit annotation. Ledger
    error → INCONCLUSIVE (verdict unchanged). All five behavior-matrix
    cases documented in the docstring.
  - Invocation site: called once after `_validate_flow3_via_ledger` in
    `main()`, only when `dev_session` ran.

- `tests/test_flow4_ledger_validation.py` — five unit tests against the
  helper covering: zero rows, error snapshot (None), agent_session
  presence, mixed source types, and empty decisions list.

Why this is decoupled from agent caprice: in-stream Flow 4 evidence
requires the agent to invoke `bicameral.preflight` and walk Step 3.5 to
trigger capture-corrections. Path-X-(b) validates the *product outcome*
(decisions written with the canonical source_type) rather than the
*mechanism* (which tool the agent chose). This means a SessionEnd
subprocess effect that lands in the ledger after the parent stream-json
closes still upgrades the verdict, even when the in-stream signal is
absent.

Closes research-brief recommendation P0 #2.

Note: this commit replaces the original 1f54f1a SHA on the branch via
rebase. Governance/META_LEDGER edits and the planning artifacts that
were bundled with the original have been dropped here and will land via
a separate governance PR. The auto-fire UserPromptSubmit hook (#146 fix)
that was also bundled is shipping via #155.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
jinhongkuan pushed a commit that referenced this pull request May 2, 2026
Cherry-picked from 1f54f1a, scope-narrowed to the surgical contribution.
The original commit was authored against an older base where the e2e
harness scaffold did not yet exist; this rebased version adds only the
new logic on top of dev's existing harness.

What this commit adds:

- `tests/e2e/_ledger_helpers.py` — pure helper
  `count_agent_session_decisions(snapshot)`, extracted so unit tests can
  import without triggering the harness's top-level env-var / CLI guards.

- `tests/e2e/run_e2e_flows.py`:
  - `_count_agent_session_decisions(snapshot)` — thin wrapper around the
    helper that hides the import inside the harness.
  - `_validate_flow4_via_ledger()` — path-X-(b) post-hoc ledger query.
    Snapshots the ledger after the harness completes and counts decisions
    with `source_type='agent_session'`. Asserter FAIL + ledger has
    agent_session → UPGRADE to PASS with explicit annotation. Ledger
    error → INCONCLUSIVE (verdict unchanged). All five behavior-matrix
    cases documented in the docstring.
  - Invocation site: called once after `_validate_flow3_via_ledger` in
    `main()`, only when `dev_session` ran.

- `tests/test_flow4_ledger_validation.py` — five unit tests against the
  helper covering: zero rows, error snapshot (None), agent_session
  presence, mixed source types, and empty decisions list.

Why this is decoupled from agent caprice: in-stream Flow 4 evidence
requires the agent to invoke `bicameral.preflight` and walk Step 3.5 to
trigger capture-corrections. Path-X-(b) validates the *product outcome*
(decisions written with the canonical source_type) rather than the
*mechanism* (which tool the agent chose). This means a SessionEnd
subprocess effect that lands in the ledger after the parent stream-json
closes still upgrades the verdict, even when the in-stream signal is
absent.

Closes research-brief recommendation P0 #2.

Note: this commit replaces the original 1f54f1a SHA on the branch via
rebase. Governance/META_LEDGER edits and the planning artifacts that
were bundled with the original have been dropped here and will land via
a separate governance PR. The auto-fire UserPromptSubmit hook (#146 fix)
that was also bundled is shipping via #155.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
jinhongkuan pushed a commit that referenced this pull request May 2, 2026
Cherry-picked from 1f54f1a, scope-narrowed to the surgical contribution.
The original commit was authored against an older base where the e2e
harness scaffold did not yet exist; this rebased version adds only the
new logic on top of dev's existing harness.

What this commit adds:

- `tests/e2e/_ledger_helpers.py` — pure helper
  `count_agent_session_decisions(snapshot)`, extracted so unit tests can
  import without triggering the harness's top-level env-var / CLI guards.

- `tests/e2e/run_e2e_flows.py`:
  - `_count_agent_session_decisions(snapshot)` — thin wrapper around the
    helper that hides the import inside the harness.
  - `_validate_flow4_via_ledger()` — path-X-(b) post-hoc ledger query.
    Snapshots the ledger after the harness completes and counts decisions
    with `source_type='agent_session'`. Asserter FAIL + ledger has
    agent_session → UPGRADE to PASS with explicit annotation. Ledger
    error → INCONCLUSIVE (verdict unchanged). All five behavior-matrix
    cases documented in the docstring.
  - Invocation site: called once after `_validate_flow3_via_ledger` in
    `main()`, only when `dev_session` ran.

- `tests/test_flow4_ledger_validation.py` — five unit tests against the
  helper covering: zero rows, error snapshot (None), agent_session
  presence, mixed source types, and empty decisions list.

Why this is decoupled from agent caprice: in-stream Flow 4 evidence
requires the agent to invoke `bicameral.preflight` and walk Step 3.5 to
trigger capture-corrections. Path-X-(b) validates the *product outcome*
(decisions written with the canonical source_type) rather than the
*mechanism* (which tool the agent chose). This means a SessionEnd
subprocess effect that lands in the ledger after the parent stream-json
closes still upgrades the verdict, even when the in-stream signal is
absent.

Closes research-brief recommendation P0 #2.

Note: this commit replaces the original 1f54f1a SHA on the branch via
rebase. Governance/META_LEDGER edits and the planning artifacts that
were bundled with the original have been dropped here and will land via
a separate governance PR. The auto-fire UserPromptSubmit hook (#146 fix)
that was also bundled is shipping via #155.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
jinhongkuan pushed a commit that referenced this pull request May 2, 2026
Cherry-picked from 1f54f1a, scope-narrowed to the surgical contribution.
The original commit was authored against an older base where the e2e
harness scaffold did not yet exist; this rebased version adds only the
new logic on top of dev's existing harness.

What this commit adds:

- `tests/e2e/_ledger_helpers.py` — pure helper
  `count_agent_session_decisions(snapshot)`, extracted so unit tests can
  import without triggering the harness's top-level env-var / CLI guards.

- `tests/e2e/run_e2e_flows.py`:
  - `_count_agent_session_decisions(snapshot)` — thin wrapper around the
    helper that hides the import inside the harness.
  - `_validate_flow4_via_ledger()` — path-X-(b) post-hoc ledger query.
    Snapshots the ledger after the harness completes and counts decisions
    with `source_type='agent_session'`. Asserter FAIL + ledger has
    agent_session → UPGRADE to PASS with explicit annotation. Ledger
    error → INCONCLUSIVE (verdict unchanged). All five behavior-matrix
    cases documented in the docstring.
  - Invocation site: called once after `_validate_flow3_via_ledger` in
    `main()`, only when `dev_session` ran.

- `tests/test_flow4_ledger_validation.py` — five unit tests against the
  helper covering: zero rows, error snapshot (None), agent_session
  presence, mixed source types, and empty decisions list.

Why this is decoupled from agent caprice: in-stream Flow 4 evidence
requires the agent to invoke `bicameral.preflight` and walk Step 3.5 to
trigger capture-corrections. Path-X-(b) validates the *product outcome*
(decisions written with the canonical source_type) rather than the
*mechanism* (which tool the agent chose). This means a SessionEnd
subprocess effect that lands in the ledger after the parent stream-json
closes still upgrades the verdict, even when the in-stream signal is
absent.

Closes research-brief recommendation P0 #2.

Note: this commit replaces the original 1f54f1a SHA on the branch via
rebase. Governance/META_LEDGER edits and the planning artifacts that
were bundled with the original have been dropped here and will land via
a separate governance PR. The auto-fire UserPromptSubmit hook (#146 fix)
that was also bundled is shipping via #155.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
jinhongkuan pushed a commit that referenced this pull request May 3, 2026
Cherry-picked from 1f54f1a, scope-narrowed to the surgical contribution.
The original commit was authored against an older base where the e2e
harness scaffold did not yet exist; this rebased version adds only the
new logic on top of dev's existing harness.

What this commit adds:

- `tests/e2e/_ledger_helpers.py` — pure helper
  `count_agent_session_decisions(snapshot)`, extracted so unit tests can
  import without triggering the harness's top-level env-var / CLI guards.

- `tests/e2e/run_e2e_flows.py`:
  - `_count_agent_session_decisions(snapshot)` — thin wrapper around the
    helper that hides the import inside the harness.
  - `_validate_flow4_via_ledger()` — path-X-(b) post-hoc ledger query.
    Snapshots the ledger after the harness completes and counts decisions
    with `source_type='agent_session'`. Asserter FAIL + ledger has
    agent_session → UPGRADE to PASS with explicit annotation. Ledger
    error → INCONCLUSIVE (verdict unchanged). All five behavior-matrix
    cases documented in the docstring.
  - Invocation site: called once after `_validate_flow3_via_ledger` in
    `main()`, only when `dev_session` ran.

- `tests/test_flow4_ledger_validation.py` — five unit tests against the
  helper covering: zero rows, error snapshot (None), agent_session
  presence, mixed source types, and empty decisions list.

Why this is decoupled from agent caprice: in-stream Flow 4 evidence
requires the agent to invoke `bicameral.preflight` and walk Step 3.5 to
trigger capture-corrections. Path-X-(b) validates the *product outcome*
(decisions written with the canonical source_type) rather than the
*mechanism* (which tool the agent chose). This means a SessionEnd
subprocess effect that lands in the ledger after the parent stream-json
closes still upgrades the verdict, even when the in-stream signal is
absent.

Closes research-brief recommendation P0 #2.

Note: this commit replaces the original 1f54f1a SHA on the branch via
rebase. Governance/META_LEDGER edits and the planning artifacts that
were bundled with the original have been dropped here and will land via
a separate governance PR. The auto-fire UserPromptSubmit hook (#146 fix)
that was also bundled is shipping via #155.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
(cherry picked from commit 8af60f3)
Knapp-Kevin pushed a commit to Knapp-Kevin/bicameral-mcp that referenced this pull request May 21, 2026
The UserPromptSubmit hook installed by BicameralAI#146/BicameralAI#155 told the agent to call
bicameral.preflight "Before invoking any file-inspection tool (Read,
Grep, Bash, Glob)". That short-circuited the caller-LLM discovery the
rest of the contract depends on:

  - bicameral.preflight uses `file_paths` for region-anchored binds_to
    lookup (the precision channel). Empty file_paths drops to fuzzy
    text-similarity over decision descriptions.
  - The user often names a *feature* ("the reorder feature") rather
    than a *file* (`reorder.ts`). The caller LLM has to do that
    mapping — it's the semantic half of "selection before generation."
  - But to do the mapping it needs Read / Grep / Glob, which the old
    reminder forbade.

Symptom on PR BicameralAI#168 / BicameralAI#165 e2e: agent fired preflight with empty
file_paths because it had no chance to inspect the codebase first.
Server returned weak / no surfaced decisions. Flow 2 asserter failed
(file_paths=[]); Flow 2a cascaded (no surfaced decisions to capture
from).

Reconcile with BicameralAI#146 by gating on the right line:

  - Read / Grep / Glob FIRST (discovery — caller LLM resolves the
    user's request to concrete file paths).
  - bicameral.preflight(topic, file_paths) — fed by step 1.
  - Write ops (Edit / Write / NotebookEdit / mutating Bash) — preflight
    must precede the first one. This is the contract assert_flow_2
    has *already* been gating; only the hook reminder was misaligned.

Files:
- scripts/hooks/preflight_reminder.py — REMINDER_TEXT rewrite + docstring
  documenting the reconciliation with BicameralAI#146
- skills/bicameral-preflight/SKILL.md — Step 2 strengthened: "Discover
  first, then preflight"; file_paths is the precision channel, omit
  only for genuinely abstract queries
- tests/test_preflight_hook.py — new test_reminder_gates_writes_not_discovery
  asserts the new posture (positive: "Read-only discovery FIRST", "BEFORE
  any write op"; negative: must NOT contain the old "before any
  file-inspection tool" phrasing)

The Flow 2 asserter is unchanged — it has always gated writes, not
reads (see lines 763-766: "Read is deliberately allowed before/in-
parallel-with preflight"). This PR aligns the hook reminder with what
the asserter already requires.
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