docs: triage ECC upstream commits 4e66b288..e9c88458

[Jamkris]

Summary

Audit log for the 2026-05-12 upstream sync round. Records the 159 commits between the maintainer's informal cutoff (`4e66b288`, 2026-04-21) and the current ECC HEAD (`e9c88458`, 2026-05-11) bucketed by path. Each commit gets a per-commit disposition (port / defer / skip) with one-line rationale.

The 1367-commit older range (`9db98673..4e66b288`) is recorded as evaluated en-bloc — its file-touches concentrate on multi-harness plugin paths and ECC-only runtime that EGC consciously diverges from.

Doc-only PR — no source changes here. Subsequent port PRs reference rows from `upstream/sync-rounds/2026-05-12.md` by SHA.

Bucket totals (focused 159-commit range)

Bucket	Count
A:skills	14
A:rules	0
A:docs	14
B:agents	0
C:commands	9
E:shared-logic	63
F:ci/packaging	2
D:other-harness	41
H:meta	8
X:needs-review	8

Port plan

Category	Port now	Evaluate during port	Defer (net-new, bigger scope)	Skip
Skill curation	5	—	3	6
Hooks + validators	2	4	—	57
Commands	1	—	—	8
Docs (incl. MCP guidance)	1	1	—	21
Other (D/F/H/agents/rules)	0	—	—	50
Total	9	5	3	142

Follow-up PRs (in suggested order)

The audit log proposes 5 PRs; 1–4 can land in parallel, PR 5 must be last:

1. `port: skill curation updates from ECC` — covers `fd95cf6`, `105b524`, `12e1bc4`, `d8f879e`, `e5229ce`, `2bb88cf`
2. `port: hook + validator fixes from ECC` — covers `0dcde13`, `e196f8a` (+ 4 to evaluate)
3. `port: plan command graceful degradation` — covers `17aafc4` (can ride along with PR 2)
4. `port: MCP disable guidance update` — covers `2fd8dfc` if portable (can ride along with PR 1)
5. `docs: advance upstream baseline to e9c88458` — updates `upstream/.upstream-sync.json` + `upstream/README.md` (+ ko-KR / zh-CN mirrors). Closes #60 when the drift workflow next runs.

Out of scope

• The 3 deferred net-new ECC skills (`tinystruct-patterns`, `ios-icon-gen`, `flox-environments`). Worth its own round once this one lands.
• A schema split between `lastSyncedSha` and `lastEvaluatedSha`. Defer.

Test plan

• `npm run lint` — clean
• `npm test` — 264/264
• Bucketing heuristic verified by sampling each bucket (skills/rules/docs/commands/hooks/CI/skip)
• EGC file matches verified for every `port` row (e.g. `scripts/hooks/block-no-verify.js`, `scripts/ci/validate-skills.js`, `commands/egc-plan.toml`)

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Summary by cubic

Adds upstream/sync-rounds/2026-05-12.md, an audit log for the 2026-05-12 upstream sync that buckets recent ECC commits and records per-commit port/skip/defer decisions plus proposed follow-up PRs. Docs-only; no source changes.

^{Written for commit 168920e. Summary will update on new commits.}

Summary by CodeRabbit

• Documentation
  • Added upstream synchronization audit log documenting commit triage and disposition tracking for the current release round.

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ℹ️ Recent review info

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Reviewing files that changed from the base of the PR and between 02e562e and 168920e.

📒 Files selected for processing (1)

• upstream/sync-rounds/2026-05-12.md

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Walkthrough

This PR adds a single audit log file documenting a systematic commit-by-commit triage of 1526 upstream commits. The log defines bucketing rules, enumerates per-bucket disposition decisions (port/skip/defer/evaluate), summarizes aggregate counts, and recommends ordered follow-up PR groupings for integration work.

Changes

Upstream Sync Round Audit Log

Layer / File(s)	Summary
Audit setup and triage methodology upstream/sync-rounds/2026-05-12.md (lines 1–50)	Establishes scope (baseline 9db98673 → HEAD e9c88458, 1526 commits) and defines the mutually exclusive path-touch bucketing rules: Skills, Rules, Docs, Agents, Commands, Shared-Logic, CI/Packaging, Harness, Meta, and Needs-Review, with bucket counts for the focused range.
Per-bucket commit disposition and category analysis upstream/sync-rounds/2026-05-12.md (lines 51–196)	Analyzes each bucket's commits with per-commit dispositions (port, skip, defer, evaluate, partial port, needs-review), enumerates representative vs. whole-bucket decisions, identifies portable vs. skipped shared-logic fixes, and covers the older en-bloc evaluation range.
Summary, recommendations, and out-of-scope tracking upstream/sync-rounds/2026-05-12.md (lines 197–228)	Aggregates disposition counts into a summary table, lists five recommended follow-up PR groupings with commit SHAs and ordering constraints, and documents deferred net-new skills and schema-split items as out-of-scope for this round.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Possibly related PRs

• Jamkris/everything-gemini-code#56: Establishes upstream-sync baseline (same 9db98673 SHA) and supporting metadata/configuration files that complement this audit log.

Suggested labels

docs

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'docs: triage ECC upstream commits 4e66b288..e9c88458' accurately describes the main change: a documentation file recording commit triage for an upstream sync round.
Linked Issues check	✅ Passed	The PR fulfills issue #60's objective by documenting the commit-by-commit triage between baseline 9db98673 and upstream HEAD e9c88458, enabling advancement of the recorded baseline.
Out of Scope Changes check	✅ Passed	The PR is documentation-only, adding a single audit log file that directly supports the linked issue's objectives. No out-of-scope code changes are present.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch docs/upstream-sync-2026-05-12

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No issues found across 1 file