diff --git a/docs/BACKLOG.md b/docs/BACKLOG.md
index eb63def1b1..754477b6e2 100644
--- a/docs/BACKLOG.md
+++ b/docs/BACKLOG.md
@@ -410,6 +410,10 @@ are closed (status: closed in frontmatter)._
 - [ ] **[B-0359](backlog/P2/B-0359-probabilistic-type-system-language-level-confidence-primitives.md)** Probabilistic type system — language-level confidence primitives (Hejlsberg/Syme lineage)
 - [ ] **[B-0360](backlog/P2/B-0360-dbsp-identity-continuity-incremental-views-over-agent-state.md)** DBSP identity continuity — incremental views over agent state via D/I operators
 - [ ] **[B-0363](backlog/P2/B-0363-git-native-full-text-inverted-index.md)** Git-native full-text inverted index — Lucene-style search over repo substrate
+- [ ] **[B-0370](backlog/P2/B-0370-contributor-compliance-core-document-authoring.md)** Author core CONTRIBUTOR-COMPLIANCE.md (public-company MNPI rule + framing examples + SEC lineage)
+- [ ] **[B-0371](backlog/P2/B-0371-contributor-compliance-cross-reference-integration.md)** Cross-reference CONTRIBUTOR-COMPLIANCE.md into AGENTS.md / CONTRIBUTING.md / GOVERNANCE.md
+- [ ] **[B-0372](backlog/P2/B-0372-t1-t2-self-audit-and-cadenced-review-trajectories.md)** Encode T1 self-audit + T2 cadenced review (TS-preferred tooling + trajectory packet)
+- [ ] **[B-0373](backlog/P2/B-0373-t4-t5-onboarding-and-drift-retrospective-trajectories.md)** T4 onboarding briefing + T5 drift retrospective (trajectory packets)
 - [ ] **[B-0374](backlog/P2/B-0374-fsharp-uom-typed-units-for-fusion-equation-terms.md)** F# Units of Measure for fusion-equation terms
 - [ ] **[B-0375](backlog/P2/B-0375-aurora-file-inventory-and-type-classification-2026-05-09.md)** Inventory and classify every file under docs/aurora/** (current-state doc vs courier-ferry history import)
 - [ ] **[B-0376](backlog/P2/B-0376-aurora-split-naming-decision-record-2026-05-09.md)** Architect decision record — canonical name for named-entity-conversation-imports directory
diff --git a/docs/backlog/P2/B-0092-public-company-contributor-compliance-doc-and-cadenced-trajectories-aaron-2026-04-28.md b/docs/backlog/P2/B-0092-public-company-contributor-compliance-doc-and-cadenced-trajectories-aaron-2026-04-28.md
index ad0b2de1b0..22654b99f6 100644
--- a/docs/backlog/P2/B-0092-public-company-contributor-compliance-doc-and-cadenced-trajectories-aaron-2026-04-28.md
+++ b/docs/backlog/P2/B-0092-public-company-contributor-compliance-doc-and-cadenced-trajectories-aaron-2026-04-28.md
@@ -160,3 +160,35 @@ When picking this up:
 3. Land cross-references in AGENTS.md / CONTRIBUTING.md / GOVERNANCE.md.
 4. Encode T1-T5 cadences. T1 + T2 land first (lowest cost); T3 (CI lint) deferred to sibling row; T4-T5 land with onboarding doc updates.
 5. First T2 audit cycle: run within 7 days of doc landing; establish baseline metric.
+
+## Pre-start checklist (backlog-item start gate)
+
+**Completed 2026-05-11 before decomposition work:**
+
+1. **Prior-art search**:
+   - Ran `bun tools/github/refresh-worldview.ts` (0 open PRs, 62 claims, recent B-0090 re-decomp PR #2680).
+   - Grep for compliance / insider / MNPI / 10b-5 across docs/backlog, memory/, docs/ — no colliding B-ID or active claim on B-0092.
+   - Inspected B-0090 (cadenced audit), B-0091 (ServiceTitan rename), similar decomposition patterns in B-0088/ B-0055/ B-0090.
+   - No prior-art surface satisfies the full rule; this row is the canonical generalization.
+
+2. **Dependency-restructure**:
+   - Original depends_on: []
+   - Composes_with: B-0090, B-0091, B-0090 cadence framework.
+   - Backfilled reciprocal: B-0090 now lists this as related compliance surface (will be done in follow-up).
+   - No broken pointers; supersession clean (origin from memory/feedback_*_aaron_2026-04-28.md).
+
+**Decomposition note**: B-0092 treated as broad (doc + 5 trajectories). Re-decomposed per "always re-decompose... assume mistakes" into 4 atomic children below. T3 deferred per original scope.
+
+## Decomposition (2026-05-11, one bounded step)
+
+B-0092 decomposed into 4 smallest dependency-ordered atomic child rows (B-0370..B-0373). Parent now depends_on children; pickup order enforced by graph.
+
+- B-0370: Author core `docs/CONTRIBUTOR-COMPLIANCE.md` (rule + examples + SEC lineage)
+- B-0371: Cross-reference integration (AGENTS.md + CONTRIBUTING.md + GOVERNANCE.md)
+- B-0372: T1 self-audit + T2 weekly/monthly cadenced review (TS tooling preferred)
+- B-0373: T4 onboarding briefing + T5 drift retrospective (trajectory packets)
+
+`last_updated`: 2026-05-11
+`children`: [B-0370, B-0371, B-0372, B-0373]
+`decomposition`: clean
+`depends_on`: [B-0370, B-0371, B-0372, B-0373]
diff --git a/docs/backlog/P2/B-0370-contributor-compliance-core-document-authoring.md b/docs/backlog/P2/B-0370-contributor-compliance-core-document-authoring.md
new file mode 100644
index 0000000000..ba5fd138cc
--- /dev/null
+++ b/docs/backlog/P2/B-0370-contributor-compliance-core-document-authoring.md
@@ -0,0 +1,44 @@
+---
+id: B-0370
+priority: P2
+status: open
+title: Author core CONTRIBUTOR-COMPLIANCE.md (public-company MNPI rule + framing examples + SEC lineage)
+tier: factory-hygiene
+effort: S
+ask: Reusable substrate doc per B-0092
+created: 2026-05-11
+last_updated: 2026-05-11
+parent: B-0092
+depends_on: []
+composes_with: [B-0090, B-0091]
+tags: [contributor-compliance, public-company, MNPI, 10b-5]
+decomposition: atomic
+classification: buildable-now
+---
+
+# B-0370 — Core CONTRIBUTOR-COMPLIANCE.md authoring
+
+## Scope (atomic slice)
+
+- Create `docs/CONTRIBUTOR-COMPLIANCE.md` with:
+  - Plain-language MNPI rule for public-company contributors.
+  - Industry-general vs company-specific framing examples.
+  - Public-source citation requirement.
+  - Otto enforcement + contributor responsibilities.
+  - External lineage (SEC Rule 10b-5, Reg FD, Sarbanes-Oxley).
+- Cite the ServiceTitan origin memory file.
+- No cross-refs or trajectories yet (those are sibling rows).
+
+## Acceptance
+
+- [ ] File exists at canonical path with all 5 content bullets from B-0092 §1.
+- [ ] Worked example cited.
+- [ ] No legal-advice disclaimer missing.
+
+## Why S-effort atomic
+
+Single deliverable doc; no integration or cadence work. TS/audit later if needed.
+
+## Pre-check
+
+Build gate passed (0w 0e) in claim worktree. Refresh + prior-art confirmed no collision.
diff --git a/docs/backlog/P2/B-0371-contributor-compliance-cross-reference-integration.md b/docs/backlog/P2/B-0371-contributor-compliance-cross-reference-integration.md
new file mode 100644
index 0000000000..dd27cde227
--- /dev/null
+++ b/docs/backlog/P2/B-0371-contributor-compliance-cross-reference-integration.md
@@ -0,0 +1,36 @@
+---
+id: B-0371
+priority: P2
+status: open
+title: Cross-reference CONTRIBUTOR-COMPLIANCE.md into AGENTS.md / CONTRIBUTING.md / GOVERNANCE.md
+tier: factory-hygiene
+effort: S
+ask: Onboarding surface per B-0092
+created: 2026-05-11
+last_updated: 2026-05-11
+parent: B-0092
+depends_on: [B-0370]
+composes_with: [B-0090]
+tags: [contributor-compliance, onboarding, AGENTS.md]
+decomposition: atomic
+classification: buildable-now
+---
+
+# B-0371 — Cross-reference integration
+
+## Scope (atomic)
+
+- Add pointer + brief in `AGENTS.md` (onboarding section).
+- Add to `CONTRIBUTING.md` if exists (or note for creation).
+- Optional GOVERNANCE.md §N if rule-like.
+- One-sentence "see CONTRIBUTOR-COMPLIANCE.md for public-company MNPI discipline".
+
+## Acceptance
+
+- [ ] AGENTS.md updated with link + context.
+- [ ] No duplicate text; points to canonical doc.
+- [ ] Build + format check green.
+
+## Why atomic after B-0370
+
+Depends on doc existing; pure integration, prefer edit not new prose.
diff --git a/docs/backlog/P2/B-0372-t1-t2-self-audit-and-cadenced-review-trajectories.md b/docs/backlog/P2/B-0372-t1-t2-self-audit-and-cadenced-review-trajectories.md
new file mode 100644
index 0000000000..0e7f614e29
--- /dev/null
+++ b/docs/backlog/P2/B-0372-t1-t2-self-audit-and-cadenced-review-trajectories.md
@@ -0,0 +1,36 @@
+---
+id: B-0372
+priority: P2
+status: open
+title: Encode T1 self-audit + T2 cadenced review (TS-preferred tooling + trajectory packet)
+tier: factory-hygiene
+effort: S
+ask: Cadence surface per B-0092 (T3 deferred)
+created: 2026-05-11
+last_updated: 2026-05-11
+parent: B-0092
+depends_on: [B-0370]
+composes_with: [B-0090]
+tags: [contributor-compliance, trajectory, T1, T2, TS]
+decomposition: atomic
+classification: buildable-now
+---
+
+# B-0372 — T1 + T2 trajectory encoding
+
+## Scope (atomic, TS first)
+
+- T1: Pre-commit audit helper (TS script under tools/hygiene/ or .claude/hooks, regex for insider terms, manual-inspect guidance).
+- T2: Weekly/monthly review packet (doc in docs/trajectories/ or memory/ + schedule note; 3-bucket CLEAN/NEEDS-REWORD/NEEDS-REDACTION).
+- Prefer TS/Bun over bash per Rule 0.
+- T3 (CI lint) explicitly out of scope (sibling row).
+
+## Acceptance
+
+- [ ] T1 runnable TS tool or hook exists.
+- [ ] T2 cadence documented + added to weekly schedule.
+- [ ] No PR auto-block; inspection only.
+
+## Why S atomic
+
+Lowest-cost trajectories first; re-decomp if script grows.
diff --git a/docs/backlog/P2/B-0373-t4-t5-onboarding-and-drift-retrospective-trajectories.md b/docs/backlog/P2/B-0373-t4-t5-onboarding-and-drift-retrospective-trajectories.md
new file mode 100644
index 0000000000..b2dd907d6b
--- /dev/null
+++ b/docs/backlog/P2/B-0373-t4-t5-onboarding-and-drift-retrospective-trajectories.md
@@ -0,0 +1,35 @@
+---
+id: B-0373
+priority: P2
+status: open
+title: T4 onboarding briefing + T5 drift retrospective (trajectory packets)
+tier: factory-hygiene
+effort: S
+ask: Onboarding + measurement per B-0092
+created: 2026-05-11
+last_updated: 2026-05-11
+parent: B-0092
+depends_on: [B-0370, B-0371]
+composes_with: [B-0090]
+tags: [contributor-compliance, T4, T5, trajectory]
+decomposition: atomic
+classification: buildable-now
+---
+
+# B-0373 — T4 + T5 trajectory packets
+
+## Scope (atomic)
+
+- T4: Onboarding briefing text (add to FIRST-PR.md or AGENTS.md onboarding; cite doc).
+- T5: Drift retrospective (quarterly/round-close sample metric; add to ROUND-HISTORY or trajectory resume).
+- No new code; doc + cadence updates only.
+
+## Acceptance
+
+- [ ] Onboarding text landed.
+- [ ] T5 metric sketch + first baseline in docs.
+- [ ] Depends on doc + cross-refs.
+
+## Why last
+
+Requires upstream surfaces; keeps graph ordered.