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name: changelog description: Query and analyze project change history and statistics. Use this before code reviews, when preparing for a deployment, when tracing change history for a specific file, or when analyzing activity by domain. Responds to questions like "recent changes", "change history for this month", or "list of bug fixes". Triggers on /changelog. version: 1.1.0 updated: 2026-02-11

Changelog Viewer

Query, filter, and produce statistics from the change history automatically recorded by the changelog-recorder.js hook.

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Skill Triggers

• /changelog — Most recent entries for the current month
• /changelog --since <date> — After a specific date
• /changelog --domain <domain> — Specific domain
• /changelog --type <type> — Specific change type
• /changelog --stats — Change statistics
• /changelog --file <path> — History for a specific file
• "show me the recent change history"
• "change history for the order domain"

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Absolute Prohibitions

1. Do not modify change history — this skill is read-only.
2. Do not edit YAML files directly — only the changelog-recorder.js hook may write entries.

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Command Options

Option	Description	Example
(none)	Most recent 20 entries for the current month	/changelog
--since <date>	After a specific date	--since 2026-02-01
--until <date>	Before a specific date	--until 2026-02-07
--last <period>	Last N days/weeks	--last 7d, --last 2w
--domain <name>	Domain filter	--domain order
--type <type>	Type filter	--type fix
--stats	Output statistics	--stats
--file <path>	File history	--file discount_service.py

Combining options: /changelog --domain order --type fix --last 7d

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Execution Steps

Receive /changelog [options]
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    v
[1] Parse options (extract filter conditions)
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    v
[2] Determine target YAML files (based on date range)
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[3] Read and parse YAML files
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[4] Apply filters (domain, type, file, date)
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[5] Sort (newest first)
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[6] Output report (or statistics)

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Step 1: Parse Options

Input	Transformed Result
--since 2026-02-01	since = 2026-02-01T00:00:00
--last 7d	since = (today - 7 days)
--last 2w	since = (today - 14 days)
--domain order	domain = "order"
--type fix	type = "fix"

Step 2: Determine Target YAML Files

Storage location: .claude/changelog/{YYYY-MM}.yaml

ls .claude/changelog/*.yaml

Step 3: Parse YAML

entries:
  - date: 2026-02-07T14:30:00
    type: feature
    domain: order
    files:
      - order/services/discount_service.py
    description: "Create discount_service in order"
    impact:
      - "external dependency added: member-api"

Step 4: Apply Filters

1. Date filter: Compare against the date field
2. Domain filter: Match against domain field (partial match)
3. Type filter: Match against type field (exact match)
4. File filter: Match against files array (substring match)

Step 5: Sort

Sort filtered entries in newest-first order (descending by date).

Step 6: Output

See references/output-formats.md for detailed output format.

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Hook Integration

Aspect	Hook (changelog-recorder.js)	Skill (/changelog)
Trigger	Auto-runs on Write/Edit	On user request
Action	Appends entry to YAML	Reads YAML + filters
Purpose	Record changes (write)	Query changes (read)

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Change Types

Type	Detection Criteria
test	File path contains tests/, test_, or .test.
docs	File extension is .md, .rst, or .txt
feature	New file created or new function added
fix	Comment contains fix/bug keywords
refactor	Comment contains refactor keyword

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Domain Extraction Rules

Path Pattern	Extracted Domain
src/domains/<domain>/...	<domain>
domains/<domain>/...	<domain>
app/services/<domain>_service.py	<domain>
(no match)	root

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Related Skill Integration

Skill	When to Link	Purpose
/impact <file>	When a frequently changed file is found	Impact analysis
/deps <domain>	When cross-domain changes are found	Dependency check
/coverage <file>	When a frequently changed file is found	Coverage check

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Reference Documents

• references/output-formats.md — Output format details
• references/examples.md — Usage examples