cc-changelog

name	cc-changelog
description	CONTRIBUTOR TOOL - Track CC changelog, extract new versions since last check, analyze impact on plugin (breaking changes, opportunities, deprecations). Run periodically or before releases. NOT part of the distributed plugin.
argument-hint	[--all|--set=VERSION]
effort	low

Claude Code Changelog Assistant

Audience: Agents, Not Humans

Imperative-only. Tables for category and shape lists.

Usage

Command	Purpose
/cc-changelog	check for new CC versions, analyze impact
/cc-changelog --all	re-analyze all versions (ignore last check)
/cc-changelog --set=2.1.85	reset last checked version, then re-run

Execution Flow

Step 1: Fetch New Entries

Run bash scripts/fetch-cc-changelog.sh (or --all for full re-fetch).

Output prefix	Action
STATUS: UP_TO_DATE	report "No new CC versions" and stop
STATUS: NEW_VERSIONS	continue with content below the header

--all flag → bash scripts/fetch-cc-changelog.sh --all. --set=X flag → bash scripts/fetch-cc-changelog.sh --set=X, then re-run without flag.

Step 2: Analyze Impact

Read new changelog entries. Classify each into one category:

Category	Meaning	Action
BREAKING	may break existing plugin functionality	immediate fix required
OPPORTUNITY	new CC feature plugin could use	add to backlog/plan
RELEVANT FIX	CC fixed a bug we worked around	check if workaround removable
DEPRECATION	CC removing something we use	plan migration
INFO	good to know, no action needed	log only

Cross-reference plugin components via ${CLAUDE_SKILL_DIR}/references/analysis-rules.md.

Step 3: Generate Report

Output structured report:

## CC Changelog Analysis: v{last_checked} → v{latest}

### BREAKING (action required)
- [version] description → **Impact**: which plugin file/component
  **Fix**: specific action needed

### OPPORTUNITY (new features)
- [version] description → **Use case**: how plugin could benefit
  **Files**: which plugin files to update

### RELEVANT FIX (workaround removal)
- [version] description → **Current workaround**: what we do now
  **Action**: can we simplify?

### DEPRECATION (migration needed)
- [version] description → **We use this in**: file:line
  **Migration**: what to change

### INFO (no action)
- [version] brief summary (collapsed)

Step 4: Update State

After user reviews the report, ask:

"Update last checked version to {latest}? [Yes/No]"

If yes: run bash scripts/fetch-cc-changelog.sh --set={latest}.

If BREAKING or DEPRECATION found, offer to create a plan.

Iron Laws

1. ALWAYS fetch before analyzing — never analyze stale cache.
2. NEVER auto-update state — user confirms after reviewing report.
3. ALWAYS cross-reference plugin files — map impact, not just summarize.
4. BREAKING changes are BLOCKERS — surface first, prominently.
5. State file is the source of truth for audit version.

Epistemic Posture

Direct language for breaking-change analysis. CC version that removes or renames a plugin API the repo uses → label BLOCKER without softening. Deprecations labeled deprecated in the CC changelog → direct flag, not "consider migrating eventually". No apology cascades, no hedge chains.