feat(agents): add plan-agent pipeline to close idea-to-implementation gap

Introduces three new weekly agents that form a triage→plan→build pipeline:

- proposal-triage-agent: evaluates proposals, dead ends, and coverage gaps;
  produces prioritized backlog in src/backlog/BACKLOG.md
- plan-agent: creates concrete implementation plans from top backlog items
  in src/plans/PLAN-*.md
- builder-agent: executes approved plans, makes code changes, verifies
  acceptance criteria

Also includes:
- Architecture proposal document in docs/proposals/
- Seeded initial backlog with 11 items from diagnosed dead ends
- Updated roster.json and weekly-scheduler.md (24 weekly agents)
- All three validators pass (prompt-contract, scheduler-roster, flow-parity)

https://claude.ai/code/session_01FLP7ibXd5QPG517g1kYCHL

src/backlog/BACKLOG.md

@@ -0,0 +1,106 @@
+# Implementation Backlog — 2026-02-21
+
+## Triage Summary
+- Items evaluated: 12
+- New items added: 12
+- Items retired: 1
+- Items promoted to ready: 4
+
+---
+
+## Priority 1: Ready to Plan
+
+### BACKLOG-001: Add `npm run format` script to package.json
+- **Source:** KNOWN_ISSUES.md, style-agent daily failures
+- **Impact:** Unblocks `style-agent` (daily cadence — currently non-functional)
+- **Scope:** Add 1-2 script entries to `package.json`
+- **Status:** ready-to-plan
+- **Acceptance:** `npm run format` exits 0; `style-agent` completes successfully on next daily run
+
+### BACKLOG-002: Create `src/lib/eventSchemas.js` canonical event builders
+- **Source:** event-schema-agent failures (2x on 2026-02-14)
+- **Impact:** Unblocks `event-schema-agent` (weekly cadence — permanently broken)
+- **Scope:** Extract event construction from `src/nostr-lock.mjs` into shared module
+- **Status:** ready-to-plan
+- **Acceptance:** `event-schema-agent` completes successfully; `src/nostr-lock.mjs` imports from new module; existing tests pass
+
+### BACKLOG-003: Revise content-audit-agent scope to match TORCH's actual features
+- **Source:** docs/agent-handoffs/incidents/2026-02-20-content-audit-no-upload-surface.md
+- **Impact:** Eliminates permanent no-op agent run from daily cadence
+- **Scope:** Rewrite `src/prompts/daily/content-audit-agent.md` to audit actual TORCH content (docs, prompts, config files) rather than nonexistent upload/contribution features
+- **Status:** ready-to-plan
+- **Acceptance:** content-audit-agent produces meaningful audit findings relevant to TORCH's actual codebase
+
+### BACKLOG-004: Implement prompt graph metadata extraction (Phase 0 of node-based editor)
+- **Source:** docs/proposals/node-based-prompt-editor.md
+- **Impact:** Machine-readable metadata for all 44+ agent prompts; enables visualization, dependency analysis, and gap detection
+- **Scope:** 4 new scripts in `scripts/prompt-graph/`, output to `artifacts/prompt-graph/graph.json`
+- **Status:** ready-to-plan
+- **Acceptance:** `npm run graph:build` exits 0; `artifacts/prompt-graph/graph.json` contains nodes for all roster agents with extracted metadata
+
+---
+
+## Priority 2: Needs Scoping
+
+### BACKLOG-005: Implement `e2e-agent` for scenario-first E2E test maintenance
+- **Source:** docs/AGENT_COVERAGE_GAPS.md (priority: HIGH)
+- **Impact:** Dedicated maintainer for end-to-end test quality per AGENTS.md scenario-first mandate
+- **Scope:** New weekly agent prompt + supporting test infrastructure
+- **Status:** needs-scoping
+- **Open Questions:** What E2E scenarios exist today? What framework to use? What's the sandbox constraint impact?
+
+### BACKLOG-006: Implement `memory-health-agent` for memory subsystem auditing
+- **Source:** docs/AGENT_COVERAGE_GAPS.md (priority: HIGH)
+- **Impact:** Quality assurance for memory retrieval relevance, embedding health, and pruning effectiveness
+- **Scope:** New weekly agent prompt
+- **Status:** needs-scoping
+- **Open Questions:** What metrics define "healthy" memory? How to test retrieval relevance?
+
+### BACKLOG-007: Implement `relay-health-agent` for relay stability monitoring
+- **Source:** docs/AGENT_COVERAGE_GAPS.md (priority: HIGH), recurring relay failures in task-logs
+- **Impact:** Automated monitoring and rotation of unhealthy relays in `torch-config.json`
+- **Scope:** New weekly agent prompt + relay rotation logic
+- **Status:** needs-scoping
+- **Open Questions:** Auto-rotation policy? How to detect relay health from sandbox? Quarantine duration?
+
+### BACKLOG-008: Implement project-type prompt packages system
+- **Source:** docs/proposals/prompt-packages.md
+- **Impact:** Curated agent sets per project type, dramatically improved onboarding for non-TORCH projects
+- **Scope:** `torch init` wizard, package metadata schema, dynamic roster generation
+- **Status:** needs-scoping
+- **Open Questions:** Package registry format? Installation mechanism? Backward compatibility with current flat roster?
+
+---
+
+## Priority 3: Deferred
+
+### BACKLOG-009: Build standalone binary distribution (Node.js SEA or pkg)
+- **Source:** docs/architecture/distribution-plan.md
+- **Impact:** Removes Node.js requirement for non-JS projects
+- **Scope:** Build scripts, CI pipeline, release automation, multi-platform binaries
+- **Status:** deferred
+- **Blocked By:** Requires external tooling setup (SEA/pkg), CI infrastructure, release management
+- **Rationale:** High value but high complexity; core agent pipeline improvements should come first
+
+### BACKLOG-010: Build hosted dashboard at dashboard.torch.sh
+- **Source:** docs/architecture/distribution-plan.md
+- **Impact:** Shareable lock visibility without local setup
+- **Scope:** Static HTML/JS site, GitHub Pages config, CDN setup
+- **Status:** deferred
+- **Blocked By:** Hosting infrastructure decisions, domain setup
+- **Rationale:** Nice-to-have; local dashboard already functional
+
+### BACKLOG-011: Implement `migration-agent` for database migration auditing
+- **Source:** docs/AGENT_COVERAGE_GAPS.md (priority: Medium)
+- **Impact:** Audit pending migrations, validate rollback scripts
+- **Scope:** New weekly agent prompt
+- **Status:** deferred
+- **Rationale:** Medium priority; higher-impact gaps should be addressed first
+
+---
+
+## Retired
+
+### RETIRED-001: content-audit-agent upload/contribution audit scope
+- **Rationale:** TORCH has no upload UI, API, storage, or moderation system. The agent was designed for a different product context and audits features that don't exist. Replaced by BACKLOG-003 which revises the agent's scope to match TORCH's actual features.
+- **Retired:** 2026-02-21