Local overrides (read this first). Before following any instruction below, check whether .claude/.local/skills/upstream/overrides.md exists. If it does, read it and treat its contents as authoritative: its instructions take precedence over anything in this skill they conflict with. This is the supported way to tailor /upstream without forking it — overrides.md lives under .claude/.local/, which sequant update and sync never overwrite.

Upstream: Claude Code Release Tracking

You are the "Upstream Assessment Agent" for the sequant repository.

Purpose

When invoked as /upstream, your job is to:

1. Fetch Claude Code release information from the public GitHub repo
2. Analyze changes against sequant's current capabilities baseline
3. Detect relevant changes using keyword matching and regex patterns
4. Skip out-of-scope changes (configured in baseline.json outOfScope)
5. Generate a structured compatibility assessment report with Actionable and Informational sections
6. Auto-create GitHub issues for breaking changes, and for deprecations, new tools and hook changes that name something sequant uses (a tool, hook event, dependency-map key or commands entry in baseline.json)
7. List opportunities in the assessment report for human triage (no individual issues created)

Invocation

# Analyze latest release
/upstream

# Analyze specific version
/upstream v2.1.29

# Analyze all releases since version
/upstream --since v2.1.25

# Dry-run mode (no issues created)
/upstream --dry-run

# Help
/upstream --help

Assessment Process

1. Parse Arguments

Parse the command arguments to determine:

• Target version: Specific version (e.g., v2.1.29) or latest
• Since version: If --since flag provided, assess all versions since that release
• Dry-run mode: If --dry-run flag, generate report but skip issue creation
• Help: If --help flag, show usage instructions

2. Fetch Release Data

Fetch release information from the public Claude Code repository:

# Get latest release
gh release view --repo anthropics/claude-code --json tagName,name,body,publishedAt

# Get specific version
gh release view v2.1.29 --repo anthropics/claude-code --json tagName,name,body,publishedAt

# List releases for --since support
gh release list --repo anthropics/claude-code --limit 50 --json tagName,publishedAt

3. Load Baseline

Load the sequant capabilities baseline from .sequant/upstream/baseline.json:

{
  "lastAssessedVersion": "v2.1.25",
  "tools": {
    "core": ["Task", "Bash", "Read", "Write", "Edit", "Glob", "Grep"],
    "optional": ["WebFetch", "WebSearch", "NotebookEdit"]
  },
  "hooks": {
    "used": ["PreToolUse", "PostToolUse", "SessionEnd"],
    "files": ["templates/hooks/pre-tool.sh", "templates/hooks/post-tool.sh", "templates/hooks/capture-tokens.sh", "hooks/hooks.json"]
  },
  "mcpServers": {
    "required": [],
    "optional": ["chrome-devtools", "context7", "sequential-thinking"]
  },
  "keywords": [
    "Task", "Bash", "hook", "PreToolUse", "PostToolUse", "SessionEnd",
    "MCP", "permission", "allow", "deny", "tool",
    "background", "parallel", "agent", "subagent",
    "settings", "config", "plugin"
  ],
  "dependencyMap": {
    "PreToolUse": ["templates/hooks/pre-tool.sh", "hooks/hooks.json", "templates/settings.json"],
    "PostToolUse": ["templates/hooks/post-tool.sh", "hooks/hooks.json", "templates/settings.json"],
    "SessionEnd": ["templates/hooks/capture-tokens.sh", "hooks/hooks.json", "templates/settings.json"],
    "Task": [".claude/skills/**/*.md", "src/lib/workflow/*.ts"]
  },
  "commands": ["claude plugin install", "claude plugin update", "claude plugin eval"],
  "outOfScope": [
    "PDF/document processing - users work with code and GitHub issues",
    "Slack/OAuth integrations - workflow is GitHub-centric",
    "Notebook editing - not a data science tool",
    "IDE-specific features (VSCode, JetBrains) - sequant is CLI/terminal focused",
    "Windows-specific fixes - sequant targets macOS/Linux",
    "OpenTelemetry - sequant emits and consumes no OpenTelemetry output"
  ]
}

4. Analyze Changes

For each release, analyze the changelog/release body:

Step 1: Extract Changes

Parse the release body to extract individual change items. Common formats:

• Bullet points: - Added new feature X
• "What's changed" sections
• BREAKING CHANGE markers

Step 2: Relevance Detection

For each change, check if it's relevant to sequant:

// Keyword matching
const isRelevant = baseline.keywords.some(kw =>
  change.toLowerCase().includes(kw.toLowerCase())
);

// Pattern matching
const patterns = {
  newTool: /added.*tool|new.*tool|introducing/i,
  deprecation: /deprecat|remov|no longer support/i,
  breaking: /breaking|incompatible|must update/i,
  hook: /hook|PreToolUse|PostToolUse/i,
  permission: /permission|allow|deny|ask/i,
};

Step 3: Categorize

Categorize each relevant change:

Step 4: Impact Mapping

For relevant changes, map to affected sequant files using dependencyMap. Its keys are specific identifiers (tools, hook events) matched case-sensitively in the change text, never generic keywords:

const impactFiles = baseline.dependencyMap[namedIdentifier] || [];

5. Check for Duplicates

Before creating issues, check for existing upstream issues:

# Search for similar issues
gh issue list --label upstream --search "<finding-title>" --json number,title

If a similar issue exists:

• Add a comment linking to the new assessment
• Skip creating a duplicate

6. Generate Outputs

Output 1: Assessment Report (GitHub Issue)

Create a summary issue with the full assessment:

## Upstream: Claude Code <version> Assessment

**Release:** [<version>](https://github.com/anthropics/claude-code/releases/tag/<version>)
**Released:** <date>
**Assessed:** <today>

### Summary

| Category | Count | Action Required |
|----------|-------|-----------------|
| Breaking Changes | N | [status] |
| New Tools | N | [status] |
| Deprecations | N | [status] |
| Opportunities | N | [status] |

### Actionable

*Breaking changes, deprecations, and other items that affect sequant.*

[list of breaking, deprecation, new-tool, hook-change findings]

### Informational

*Opportunities noted for human triage. No individual issues auto-created.*

[list of opportunity findings]

### No Action Required

[list of irrelevant changes]

---

*Generated by /upstream skill*

Output 2: Individual Issues (Actionable Findings)

Create an issue for every breaking change, and for each deprecation, new-tool or hook-change finding that is relevant: it names a tool, hook event, dependency-map key or commands entry from baseline.json (case-sensitive), or its affected files include a path that exists. Generic keywords (hook, MCP, tool, plugin) don't count. Note: Opportunities and non-relevant findings do NOT get individual issues — they stay listed in the assessment report for human triage.

## feat: Leverage <feature> from Claude Code <version>

**Upstream:** Claude Code <version>
**Category:** <category>
**Assessment:** #<assessment-issue>

### Context

<description from release notes>

### Opportunity

<how sequant could use this>

### Proposed Implementation

[To be determined during /spec phase]

### Acceptance Criteria

- [ ] AC-1: [To be defined]

---

*Auto-created by /upstream assessment #<N>*

Labels: upstream, needs-triage, enhancement

Output 3: Local Report

Save to .sequant/upstream/<version>.md:

# Claude Code <version> Assessment

Assessed: <date>
Previous: <last-assessed-version>

## Summary

[same as GitHub issue]

## Raw Findings

[detailed analysis data]

Output 4: Update Baseline

Update .sequant/upstream/baseline.json:

• Set lastAssessedVersion to the assessed version

7. Multi-Version Batching

When --since <version> is used:

1. List all releases after the specified version
2. Assess each version individually
3. Create a batched summary issue linking all individual assessments
4. Update baseline to latest assessed version

Dry-Run Mode

When --dry-run is specified:

1. Perform full analysis
2. Generate local report
3. Output what issues WOULD be created (titles, labels)
4. Skip actual GitHub issue creation
5. Skip baseline update

Error Handling

• No releases found: Exit with clear message
• Baseline missing: Create default baseline, warn user
• GitHub API errors: Retry with backoff, then fail gracefully
• Already assessed: Skip with message (idempotent)

Output Verification

Before completing, verify:

• Release data successfully fetched
• Baseline loaded (or created with defaults)
• Each change categorized
• Duplicates checked before issue creation
• Assessment report created (or dry-run output shown)
• Individual issues created for breaking changes and relevant actionable findings (not opportunities)
• Local report saved
• Baseline updated with new version

Examples

Example 1: Assess Latest Release

/upstream

Fetching latest Claude Code release...
Release: v2.1.29 (2025-01-31)

Loading baseline from .sequant/upstream/baseline.json...
Last assessed: v2.1.27

Analyzing 12 changes from release notes...
- 3 relevant changes detected
- 9 no-action changes

Findings:
1. [opportunity] New --background flag on Task tool
   Matched keywords: Task, background
   Impact files: .claude/skills/**/*.md

2. [hook-change] Permissions now respect content-level ask
   Matched keywords: permission
   Impact files: (none — "permission" is a generic keyword; listed, no issue)

3. [deprecation] PreToolUse field oldHookName deprecated
   Matched pattern: deprecat
   Impact files: templates/hooks/pre-tool.sh, hooks/hooks.json, templates/settings.json

Creating assessment issue...
Created: #250 - Upstream: Claude Code v2.1.29 Assessment

Creating individual issues...
Created: #251 - feat: Leverage new --background flag from Claude Code v2.1.29
Created: #252 - chore: Update to new hook name (deprecation from v2.1.29)

Saving local report to .sequant/upstream/v2.1.29.md...
Updating baseline lastAssessedVersion to v2.1.29...

Done! Assessment complete.

Example 2: Dry Run

/upstream --dry-run

[DRY RUN MODE - No issues will be created]

Fetching latest Claude Code release...
Release: v2.1.29 (2025-01-31)

...analysis...

Would create issues:
1. Assessment: Upstream: Claude Code v2.1.29 Assessment
2. Finding: feat: Leverage new --background flag from Claude Code v2.1.29
3. Finding: chore: Update to new hook name (deprecation from v2.1.29)

Local report saved: .sequant/upstream/v2.1.29.md
Baseline NOT updated (dry-run mode)

Example 3: Already Assessed

/upstream

Fetching latest Claude Code release...
Release: v2.1.29 (2025-01-31)

Already assessed: .sequant/upstream/v2.1.29.md exists
Use --force to re-assess.

No action taken.

Notes

• This is an internal tool for sequant maintainers
• All created issues get needs-triage label for human review
• The skill is read-only for Claude Code repo (no PRs or edits)
• Baseline file should be committed to version control
• Local reports in .sequant/upstream/ should be committed

This skill monitors the upstream Claude Code project to help sequant stay current with new features and breaking changes.