Windsurf + Aider targets, MCP server, and demo placement (#33)

Broadens both reach (more tools) and content types (an MCP server), continuing
the multi-platform story.

Windsurf + Aider:
- build-exports.mjs gains two platforms: exports/windsurf/*.md (workspace rules,
  trigger: model_decision) and exports/aider/*.md (conventions for `aider --read`).
  Now 5 platforms (ChatGPT, Gemini, Cursor, Windsurf, Aider).
- install.sh + bin/cli.mjs install both (windsurf -> .windsurf/rules, aider ->
  .aider/skills with a --read hint); generated README index is excluded from copies.
- One-line windsurf-install.sh / aider-install.sh wrappers for parity.

MCP server (new content type):
- mcp/server.mjs — zero-dependency stdio MCP server exposing list_skills,
  search_skills, get_skill. Published as a second bin (pm-claude-skills-mcp).
  Logs to stderr; reads bundled skills/ at startup. mcp/README.md documents
  client config.

Also: README hero "See it in action" demo placement (ready to swap in a GIF;
recording guide in web/docs-assets/README.md), Works-With table + exports +
install docs updated, CHANGELOG Unreleased. package.json files/bin updated.


Claude-Session: https://claude.ai/code/session_016JWn5jRD5tcEFKrubjQ6Px

Co-authored-by: Claude <noreply@anthropic.com>

exports/windsurf/pm-legal/legal-brief/legal-brief.md

@@ -0,0 +1,80 @@
+---
+trigger: model_decision
+description: "Draft a structured legal brief, case summary, or legal argument outline. Use when asked to write a legal brief, case note, legal memo, argument outline, or position paper. Produces a structured document using IRAC format (Issue, Rule, Application, Conclusion)."
+---
+
+# Legal Brief Skill
+
+This skill drafts structured legal briefs and memos using IRAC format — the standard structure for legal writing.
+
+## Required Inputs
+- **Brief type** (legal memo / case summary / argument outline / position paper / letter before action)
+- **Legal issue or question**
+- **Jurisdiction** (England & Wales / US / EU / Other)
+- **Relevant facts**
+- **Relevant law or cases** (if known — otherwise flagged as [RESEARCH NEEDED])
+- **Audience** (internal memo / court submission / client letter)
+
+## Output Structure
+
+### Header
+- **To:** [Recipient]
+- **From:** [Author]
+- **Date:** [Date]
+- **Re:** [Matter reference]
+- **Confidential:** Subject to legal professional privilege
+
+### Issue(s)
+One sentence per legal question:
+- Issue 1: Whether X constitutes Y under [law]
+
+### Brief Answer
+One sentence per issue — conclusion upfront before analysis.
+
+### Facts
+Concise relevant facts only. Flag disputed facts.
+
+### Law (Rule)
+- Relevant statute, regulation, or case law
+- How the rule has been interpreted in key cases
+- Flag [RESEARCH NEEDED] where law is not provided
+
+### Application
+- Arguments in favour
+- Counter-arguments and responses
+- Areas of uncertainty flagged explicitly
+
+### Conclusion
+- Clear answer to each issue
+- Overall recommendation
+- Suggested next steps
+
+### Caveats
+What this memo does not cover. What additional research would change the analysis.
+
+---
+
+WARNING: This draft requires review by a qualified legal professional. It does not constitute legal advice.
+
+## Quality Checks
+
+- [ ] Issue is stated as a specific legal question (not a general topic)
+- [ ] Brief answer appears before the analysis (conclusion upfront)
+- [ ] Disputed facts are explicitly flagged
+- [ ] Areas of legal uncertainty are noted (not hidden in confident language)
+- [ ] Caveats section lists what would change the analysis
+- [ ] Disclaimer is included
+
+## Anti-Patterns
+
+- [ ] Do not present uncertain legal positions with confident language — areas of legal ambiguity must be flagged explicitly, not smoothed over
+- [ ] Do not omit the disclaimer — every legal brief output must include the professional review caveat before the user treats it as advice
+- [ ] Do not structure the brief chronologically — IRAC format (Issue, Rule, Application, Conclusion) must be used regardless of how the user framed the request
+- [ ] Do not cite cases or statutes from memory without flagging them as [REQUIRES VERIFICATION] — hallucinated citations are worse than no citations
+- [ ] Do not conflate jurisdiction — legal positions in England & Wales, US, and EU can differ materially; always confirm jurisdiction before stating the rule
+
+## Example Trigger Phrases
+- "Draft a legal memo on [issue]"
+- "Write a legal brief arguing [position]"
+- "Summarise the legal position on [topic]"
+- "Write a letter before action for [situation]"