WP04 re-section classification audit (FR-012 / #2054)

This note is the auditable per-file record for WP04's re-section of the former docs/development/ and docs/plans/engineering-notes/ working sets. Every page was classified individually (not a wholesale directory move) against the explicit decision rules in the WP04 prompt, and the rule that fired is recorded per page so the reviewer audits the reason, not just the bucket.

Decision rules (from the WP04 prompt)

• E1 — Ephemeral → plans/: filename or content contains any of sprint, session, WP##/wp-, mission-<slug>, an effort-tied date-stamp, "status update", "tracking", "handoff", "scratch", or it narrates a one-time investigation / decision-in-progress.
• D-OPS — Durable → operations/: runbook / deployment / on-call / incident procedure.
• D-GUIDE — Durable → guides/: how-to / tutorial / contributor workflow that outlives any one mission.
• D-CONFIG — Durable → configuration/: settings / env-var / toolchain / config reference.
• TB — Tie-breaker: "would this page still be correct and useful two missions from now?" yes → durable, no → ephemeral.

doc_status (draft|active, distil-then-retire) is governed at the section level by docs/plans/index.md — matching the convention WP03 established for the architecture/-rooted plans (no per-file frontmatter was added there), so WP04 does not churn per-file frontmatter either.

Durable pages

Page (from docs/development/)	Rule fired	→ Section
ssh-deploy-keys.md	D-OPS — one-time CI/CD deploy-key provisioning runbook	operations/
identity-boundary-ci-gate.md	D-OPS — standing drift-detector required check + cross-repo SHA-bump procedure	operations/
testing-flakiness.md	D-GUIDE — flakiness handling policy / how-to, outlives missions	guides/
testing-parallel.md	D-GUIDE — how-to run the suite in parallel	guides/
contract-pinning.md	D-GUIDE — contributor workflow (pin observable contracts)	guides/
review-gates.md	D-GUIDE — pre-PR / pre-review checklist workflow	guides/
local-overrides.md	D-GUIDE — cross-package local-dev how-to	guides/
yaml-libraries.md	D-CONFIG — toolchain/dependency choice reference (ruamel vs PyYAML)	configuration/
linting-cutoff-policy.md	D-CONFIG — commitlint/markdownlint informational-mode policy + cutoff	configuration/

Ephemeral pages → plans/

Page (from docs/development/)	Rule fired
3-2-archive-migration-plan.md	E1 — 3.2 docs-refresh effort-scoped plan
3-2-cli-reference-audit-meta-issues.md	E1 — audit log / meta-issue tracking
3-2-cli-reference-methodology.md	E1 — mission spec-kitty-3-2-docs WP05 evidence record
3-2-coord-merge-issue-hygiene-log.md	E1 — issue-hygiene "log" (tracking)
3-2-harness-research-method.md	E1 — 3.2 harness research method (effort-tied)
3-2-information-architecture.md	E1 — 3.2 docs-refresh IA (one effort)
3-2-navigation-plan.md	E1 — T007/T008 task-tied navigation plan
3-2-publication-checklist.md	E1 — 3.2 publication checklist (effort-tied)
3-2-version-taxonomy.md	E1 + TB — mission spec-kitty-3-2-docs taxonomy; durable-leaning but mission-tied → ephemeral
391-doctrine-usage-test.md	E1 — #391 WP11 dogfood
charter-path-resolution-gaps.md	E1 — gap-analysis investigation
ci-coverage-gate-tuning.md	E1 + TB — Mission 062 WP07 tuning notes, branch-tied → ephemeral
code-review-2026-03-25.md	E1 — date-stamped one-time review
doctrine-artifact-selection-preflight.md	E1 — pre-flight investigation
doctrine-inclusion-assessment.md	E1 — assessment investigation
doctrine-migration-architecture-review.md	E1 — architecture alignment review
epic-1111-slice-landing-plan.md	E1 — epic landing plan
issue-1040-scope-assessment.md	E1 — issue scope assessment
issue-1111-analysis.md	E1 — issue analysis report
layered-doctrine-resolution-design.md	E1 — design-in-progress blueprint
mission-b-proposed-scope.md	E1 — mission-tied proposed scope
mission-next-compatibility.md	E1 — explicitly marked HISTORICAL / superseded
model-first-schema-generation.md	E1 + TB — dated, PR-branch-tied writeup → ephemeral
mutation-testing-findings.md	E1 — WP05 findings
org-doctrine-layer-architecture-review.md	E1 — post-implementation review
pr305-review-resolution-plan.md	E1 — PR-tied resolution plan
quality_check_structure.md	E1 + TB — narrates one-time CI-workflow change → ephemeral
runtime-charter-doctrine-boundary.md	E1 — boundary audit + recommendations
slice-f-gap-analysis.md	E1 — slice gap analysis
slice-f-mission-debrief.md	E1 — mission debrief
test-execution-report-pr305.md	E1 — PR test-execution report
test-plan-pr305.md	E1 — PR test plan
test-suite-friction-audit.md	E1 — friction audit
wp-prompt-governance-atdd-findings.md	E1 — ATDD findings
tracking/next-mission-mappings/* (3 files)	E1 — "tracking" in path → plans/next-mission-mappings/

docs/plans/engineering-notes/ → plans/engineering-notes/

The whole engineering_notes/ tree is investigations / traces / reflections / triage (E1 by the occurrence-map moves: docs/plans/engineering-notes → docs/plans). Moved as a subtree (plans/engineering-notes/) to stay fully disjoint from WP03's architecture/-rooted plans content (avoids the index.md collision).

Stays put (operator directive)

• docs/development/3-2-page-inventory.yaml — page-inventory tooling artifact; the 4 lockfile modules read it at this exact path. Guarded by tests/docs/test_inventory_path_stable.py.
• docs/development/mutation-testing-tactic.yaml — doctrine tactic artifact (non-page .yaml, outside WP04's *.md ownership).

IC-01 — borderline pages (tie-breaker resolved, no hard gap)

No page fit no rule. Four pages had durable-leaning content but effort/mission/date/branch-tied framing tipped them ephemeral via the tie-breaker; flagged here for reviewer attention: 3-2-version-taxonomy.md, ci-coverage-gate-tuning.md, model-first-schema-generation.md, quality_check_structure.md. Each can be distilled into a durable reference later under the plans distil-then-retire lifecycle if the durable kernel is confirmed reusable.

#2054 resolution note (issue-matrix)

#2054 (the docs/development/ durable-vs-ephemeral mixing drift) is resolved: docs/development/ no longer mixes durable references with one-off tracking notes — durable pages are split across operations/, guides/, configuration/; ephemeral notes are consolidated under plans/. The page-inventory tooling artifact stays put (no freshness-gate self-block). Mission B should carry Closes #2054 on the PR (FR-012).