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/aider/pm-sales/account-plan/account-plan.md

@@ -0,0 +1,99 @@
+# Account Plan Skill
+
+Produces a structured account plan — the document that separates account managers who grow accounts from those who just service them.
+
+## Required Inputs
+- **Account name**
+- **Current ARR / revenue**
+- **Contract renewal date**
+- **Key contacts** (names, roles, relationship strength)
+- **Products/services currently in use**
+- **Known opportunities or expansion areas**
+- **Known risks**
+- **Planning horizon** (6 / 12 / 24 months)
+
+## Output Structure
+
+---
+
+# Account Plan: [Account Name]
+**Account Manager:** [Name] | **Period:** [Date range]
+
+---
+
+### Account Snapshot
+
+| Metric | Current | Target (EOY) |
+|---|---|---|
+| ARR / Revenue | £[amount] | £[target] |
+| NPS / Health score | [Score] | [Target] |
+| Products in use | [List] | [Expansion targets] |
+| Renewal date | [Date] | — |
+| Risk level | Low / Medium / High | — |
+
+---
+
+### Relationship Map
+
+| Name | Title | Influence | Relationship | Notes |
+|---|---|---|---|---|
+| [Name] | [Role] | Decision maker / Influencer / User | Strong / Neutral / Weak | [Insight] |
+
+**Relationship gaps:** [Who we do not have access to that we should]
+**Executive sponsor:** [Do we have one? If not — who could become one?]
+
+---
+
+### Why They Stay (Retention Anchors)
+[2-3 specific reasons this account renews. If the list is short, that is the risk signal.]
+
+---
+
+### Growth Opportunities
+
+| Opportunity | Product | Est. Value | Timeline | Next Action |
+|---|---|---|---|---|
+| [Opportunity] | [Product] | £[value] | [Q/Year] | [Specific action] |
+
+**Whitespace:** What products do we have that this account does not use, and why?
+
+---
+
+### Risks and Mitigation
+
+| Risk | Likelihood | Impact | Mitigation | Owner |
+|---|---|---|---|---|
+| [Risk] | H/M/L | H/M/L | [Action] | [Name] |
+
+---
+
+### 90-Day Action Plan
+
+| Action | Why | Owner | Due |
+|---|---|---|---|
+| [Specific action] | [Why it matters] | [Name] | [Date] |
+
+**Next QBR / EBR:** [Date — if no EBR cadence, flag as a risk]
+
+---
+
+### Success Criteria
+At end of [period]:
+- Renewed at or above current ARR
+- [Expansion opportunity] progressed to [stage]
+- Health score moved from [current] to [target]
+
+## Anti-Patterns
+
+- [ ] Do not list only executive contacts in the relationship map — champions and day-to-day users are often more influential on renewal decisions
+- [ ] Do not set growth opportunity estimates without a basis — even rough ARR values prevent the plan from being treated seriously
+- [ ] Do not treat "no known risks" as acceptable — if no risks are identified, the plan hasn't been scrutinised honestly
+- [ ] Do not write 90-day actions as vague aspirations ("strengthen the relationship") — each action must specify a call, meeting, or deliverable with a named owner
+
+## Quality Checks
+
+- [ ] Relationship map identifies decision-makers, influencers, and any relationship gaps
+- [ ] Risks all have mitigation actions and named owners
+- [ ] Growth opportunities include estimated value (even roughly)
+- [ ] 90-day actions are specific (not "have a call" — what call, with whom, to achieve what)
+- [ ] Success criteria are measurable at the end of the planning period