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-cross/executive-summary/executive-summary.md

@@ -0,0 +1,107 @@
+---
+trigger: model_decision
+description: "Write an executive summary for any document, report, or proposal. Use when asked to write an executive summary, management summary, briefing paper, or one-pager for senior stakeholders. Produces a structured summary that busy executives can read in under 3 minutes and act on."
+---
+
+# Executive Summary Skill
+
+Writes executive summaries that busy decision-makers actually read — front-loaded with conclusions, structured for skimming, ruthless about what to include.
+
+## Required Inputs
+- **Source document or topic** (paste or describe)
+- **Audience** (CEO / board / investor / minister / client / committee)
+- **Decision or action needed** (what should the reader do after reading?)
+- **Length limit** (1 page / 2 pages / 500 words)
+- **Format** (formal report / slide / email / briefing paper)
+
+## Core Principle
+
+An executive summary is NOT a summary of the document. It is a standalone document that:
+- States the conclusion upfront — not at the end
+- Contains only what the reader needs to make a decision
+- Can be understood without reading anything else
+- Recommends a specific action
+
+## Output Structure
+
+---
+
+### [Title]
+**Executive Summary**
+*Prepared for: [Audience] | Date: [Date] | Author: [Name]*
+
+---
+
+**Bottom line up front:**
+[The most important thing. The recommendation or finding. 2-3 sentences. A reader who only reads this should know what you are asking or telling them.]
+
+---
+
+**Background (why this matters):**
+[2-3 sentences. Minimum context to understand the bottom line. Not the history — just what the reader needs now.]
+
+---
+
+**Key findings / analysis:**
+- **[Finding 1]:** [One sentence — specific and evidence-based]
+- **[Finding 2]:** [One sentence]
+- **[Finding 3]:** [One sentence]
+
+---
+
+**Options considered:** (include only if a decision is being presented)
+
+| Option | Benefit | Risk | Recommendation |
+|---|---|---|---|
+| [Option A] | [Benefit] | [Risk] | Recommended |
+| [Option B] | [Benefit] | [Risk] | Not recommended |
+
+---
+
+**Recommendation:**
+[Specific. "We recommend [action] because [reason]. This will [outcome]." Not "we suggest consideration of options."]
+
+---
+
+**Immediate next steps:**
+- [Action 1 — specific, with owner and date]
+- [Action 2]
+
+---
+
+**Risks of inaction:** [What happens if the reader does nothing]
+
+**Full report:** [Reference to where the full document can be found]
+
+---
+
+## Adapting for Different Audiences
+
+**CEO/MD:** Lead with financial or strategic impact. 1 page. Make the decision binary. Ask in sentence one.
+**Board:** Lead with governance or risk. Frame against organisational objectives. State specifically what you need from them.
+**Investor:** Lead with return or opportunity. Specific numbers. 1 page. Anticipate "why now."
+**Minister/senior public sector:** Lead with public benefit or policy alignment. Include cost-benefit framing.
+**Client:** Lead with their problem. Show you understand before presenting recommendation.
+
+## Quality Checks
+
+- [ ] Bottom line in first 3 sentences
+- [ ] Standalone — no need to read full document
+- [ ] Recommendation is specific
+- [ ] Fits length limit
+- [ ] Written for audience priorities not author priorities
+- [ ] Next steps have owners and dates
+
+## Anti-Patterns
+
+- [ ] Do not summarise the document chronologically — an executive summary that follows the structure of the source document is not an executive summary, it is an abstract
+- [ ] Do not bury the recommendation at the end — executives read the first paragraph and skim the rest; the ask must be in sentence one or two
+- [ ] Do not use the same summary for different audiences — a CEO and a board member have different decision contexts and require different framing
+- [ ] Do not include background that the reader already knows — every sentence of background must earn its place by making the bottom line more actionable
+- [ ] Do not leave the "risks of inaction" section vague — a summary that does not quantify what happens if the reader does nothing removes the urgency needed for a decision
+
+## Example Trigger Phrases
+- "Write an executive summary of this report: [paste]"
+- "Summarise this document for the board: [paste]"
+- "Create a one-pager from this proposal for the CEO"
+- "Turn these findings into an exec summary"