| name | report-feature-changes |
| description | Validate uac's assumptions about supported AI tools (Claude Code, Copilot, Cursor, etc.) against current upstream documentation and produce a written report of drift — renamed fields, new events, deprecated features, schema changes — so the user can plan follow-up changes. Does not modify source code. |
| userInvocable | true |
| argumentHint | [--tool <name>] [--feature <category>] |
| allowedTools | {"claude":["Read","Grep","Glob","Bash","WebFetch","WebSearch","Write","AskUserQuestion"]} |
Report Feature Changes
Compare uac's implementation against the latest upstream documentation for each supported AI tool. Produce a structured report of out-of-date assumptions so the user can decide what to change.
This skill does not modify uac source files. It only produces a report. Any code/doc changes are a follow-up step.
Inputs
Parse $ARGUMENTS:
--tool <name> — restrict to one tool (claude, copilot, cursor). Defaults to all supported tools.--feature <category> — restrict to one Part 1 feature category from the reference (e.g. hooks, mcp, frontmatter, tools). Defaults to all categories.
If no arguments are provided, ask the user with AskUserQuestion whether they want to validate everything (slow, thorough) or scope down to a single tool/feature first.
Step 1: Load the Validation Reference
Read upstream-validation-reference.md — the companion file in this skill directory. It defines:
- Part 1 — the feature categories to validate (file locations, frontmatter, hooks, tools, MCP, permissions, models, etc.) and where each is implemented in uac (
src/targets/<tool>/index.ts, etc.).
- Part 2 — per-tool documentation URLs grouped by tier. Tier 1 is authoritative (vendor reference docs). Tier 2 is for dating changes (changelogs). Tier 3 is community/supporting evidence only.
- Part 5 — known documentation quality caveats (beta-API churn, in-product-only docs, vendor terminology drift, multiple doc surfaces).
Treat this reference as the source of truth for what to check and where to look. Do not invent new URLs — if a needed doc page is missing from the reference, note it as a gap in the final report.
Step 2: Snapshot uac's Current Assumptions
Before fetching any docs, read uac's current implementation for each tool in scope so you have a concrete baseline to compare against. For each tool:
src/targets/<tool>/index.ts — outputDir, supportedTypes, frontmatterMap for each template type, EVENT_NAME_MAP, transform*Hooks(), transform*MCP().src/types.ts — UniversalFrontmatter, UniversalHookHandler, UniversalMCPServer, UniversalMCPInput, TemplateType union.src/seed-types/meta-instructions/templates/instructions/uac-template-guide.md — documentation claims (frontmatter field tables, hook event mapping table, tools tables). Drift here is a finding too.src/core/writer.ts — CLEAN_PATHS, CLEAN_MCP_PATHS.
Note specific identifiers (event names, frontmatter field names, tool names, output paths) so the comparison in Step 3 can be exact, not vague.
Step 3: Fetch and Compare
For each (tool × feature category) pair in scope:
- Fetch the Tier 1 URL(s) from Part 2's per-feature index using WebFetch. Prefer the most specific page first; fall back to the docs home only if the specific page 404s.
- Extract the authoritative section — usually a reference table (event list, frontmatter fields, tool names, MCP server fields).
- Compare against the uac snapshot from Step 2. Classify each discrepancy:
- Added — upstream supports something uac doesn't expose.
- Removed / deprecated — uac generates something upstream no longer accepts.
- Renamed — same concept, different identifier.
- Status change — moved from beta → stable or stable → deprecated.
- Schema change — same field, different type / shape.
- For each discrepancy, search Tier 2 (changelog / release notes) for a corresponding announcement. If found, capture the date and a quoted excerpt. If not found, lower the finding's confidence.
- Apply the Part 5 caveats:
- Beta features → lower confidence, flag explicitly.
- In-product-only features → mark as "documentation-incomplete, manual verification required."
- Conflicting vendor surfaces (e.g. Copilot's
docs.github.com vs code.visualstudio.com) → note the conflict and pick the surface that matches the behavior being checked.
If WebFetch fails for a URL (network error, 404, rate limit), record the URL as unreachable in the report rather than silently skipping the category.
Step 4: Write the Report
Write the report to the OS temp directory at /tmp/upstream-validation-report-YYYY-MM-DD.md (use today's date). Do not write the report anywhere inside the repo (especially .universal-ai-config/, .claude/, .github/, .cursor/, or a repo-local tmp/) — it is not a template and must not be picked up by uac generate or committed accidentally.
Use this structure:
# Upstream Validation Report — YYYY-MM-DD
**Scope:** <tools and feature categories validated>
**Reference doc:** .universal-ai-config/skills/report-feature-changes/upstream-validation-reference.md
## Summary
- N findings (X high confidence, Y medium, Z low)
- N unreachable URLs
- N documentation-incomplete categories
## Findings
### <Tool> — <Feature category>
#### <Finding 1 title>
- **Type:** added | removed | renamed | status change | schema change
- **Confidence:** high | medium | low
- **Upstream evidence:** <URL> — "<quoted excerpt>"
- **Tier 2 evidence:** <changelog URL + date, or "no announcement found">
- **uac files affected:**
- `src/targets/<tool>/index.ts:<line range>` — <what's there now>
- `src/seed-types/meta-instructions/templates/instructions/uac-template-guide.md` — <which table>
- **Suggested change:** <one or two sentences>
- **Caveats:** <beta status, conflicting surfaces, in-product-only, etc.>
#### <Finding 2 title>
...
## Unreachable URLs
- <URL> — <error>
## Documentation Gaps
Categories where Tier 1 docs don't expose the answer (manual in-product verification needed):
- <Tool> — <category> — <what's missing>
## Reference Doc Maintenance
If Part 2 URLs in the reference doc were broken or restructured, list them here so they can be updated:
- <URL> — <how it failed>
Order findings by confidence (high first) within each tool/category section, so the most actionable items are at the top.
Step 5: Hand Off to the User
After writing the report, output a short summary in chat:
- Path to the report.
- Headline counts (findings by confidence, unreachable URLs, doc gaps).
- A one-line recommendation for what to tackle first — typically the highest-confidence "renamed" or "removed" findings, since those mean uac is currently generating invalid config.
Do not start editing uac source files based on the report. The user reviews the report and decides what to plan; further changes are a separate task.
