SkillCheck validator, Cursor exports, and per-agent installers (#27)

Three more learnings from alirezarezvani/claude-skills, applied:

1. SkillCheck validator (scripts/skillcheck.mjs) — validates every SKILL.md
   against the authoring standard (frontmatter, name/folder match, trigger +
   produces clauses, required headings) plus tier referential integrity.
   Errors fail CI; --strict fails on warnings too. New skillcheck.yml workflow
   and a SkillCheck status badge in the README. Current: 0 errors / 14 advisory
   warnings across 172 skills.

2. Cursor export platform — build-exports.mjs now generates
   exports/cursor/<bundle>/<skill>/<skill>.mdc rule files. The PLATFORMS
   registry now supports per-skill filenames (file as a function).

3. Per-agent installers — scripts/install.sh unifies install for
   claude/hermes/codex/openclaw/cursor (--link, --target, --dry-run, --list).
   Curl-able one-liners codex-install.sh, openclaw-install.sh, and
   cursor-install.sh clone the library and install in a single command.

README documents the one-line installs and Cursor exports; CHANGELOG and the
authoring standard updated.


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

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

exports/cursor/pm-gtm/media-pitch/media-pitch.mdc

@@ -0,0 +1,93 @@
+---
+description: "Write a media pitch or press outreach email for any story or announcement. Use when asked to write a media pitch, journalist outreach email, press pitch, or story angle for PR. Produces a concise pitch with a compelling news angle, journalist-specific hook, and clear call to action."
+globs:
+alwaysApply: false
+---
+
+# Media Pitch Skill
+
+Writes media pitches that journalists actually respond to — built around the story angle, not the company's desire for coverage. Most pitches fail because they are press releases in an email. Good pitches are a human proposing a story to another human.
+
+## Required Inputs
+
+Ask the user for these if not provided:
+- **The story** (what is the actual news or interesting angle?)
+- **Target publication or journalist** (who are you pitching to and what do they cover?)
+- **Company or organisation** (who is behind this?)
+- **Key proof point** (data, customer story, or exclusive that makes this credible)
+- **Why now** (why is this timely?)
+- **What you are offering** (interview / exclusive data / embargoed information / spokespeople)
+
+## Output Structure
+
+---
+
+### Pitch: [Target journalist / outlet]
+
+**Subject line:** [Under 10 words. The story angle, not the company name. Specific, not "Exciting news from [Company]"]
+
+---
+
+Hi [First name],
+
+[Opening sentence — one hook that makes them want to read the next line. Reference their recent work if genuinely relevant: "I read your piece on X last week, which is why I thought you'd be interested in this."]
+
+[Paragraph 1 — The story in 2–3 sentences. Lead with why the reader of [publication] would care. Not what the company does. The news angle, with the most interesting fact first.]
+
+[Paragraph 2 — Why this is a story now. One data point, trend, or timely hook. Be specific: "In the last 6 months, X has increased by Y, according to [source]." Generic claims about "growing trends" are ignored.]
+
+[Paragraph 3 — What you are offering. Interview with [specific person + their relevant credential]. Exclusive data / first look. Access to [specific thing]. One clear offering.]
+
+[Brief company context — 1 sentence maximum. Journalists don't need your history; they need to know you're credible.]
+
+Happy to send more details, connect you with [spokesperson], or share [specific exclusive asset] under embargo.
+
+[Name]
+[Title, Company]
+[Mobile — journalists work on deadline and text faster than email]
+
+---
+
+## Pitch Rules
+
+- Subject line is the pitch — if it doesn't earn a click, nothing else matters
+- The story angle is not "Company launches product" — it is what that product reveals about the world
+- One pitch, one journalist — mass BCC pitches are recognisable and ignored
+- Follow up once, after 3–5 business days, with new information (not "just checking in")
+- If offering an exclusive, name it explicitly and set a response deadline
+
+## Angle Development Framework
+
+If the user doesn't have a strong angle, help them find one:
+
+| Angle type | Example | Works for |
+|---|---|---|
+| Data reveal | "Our research of 10,000 users shows X" | Survey findings, product insights |
+| Trend + proof | "This is happening and here is evidence" | Market trends, behaviour change |
+| Contrarian | "Everyone thinks X but actually Y" | Counter-intuitive findings |
+| Human story | "This person's experience illustrates X" | Customer stories, case studies |
+| Milestone | "First / fastest / largest in [category]" | Launches, records |
+
+## Quality Checks
+
+- [ ] Subject line is the story angle (under 10 words, no company name)
+- [ ] Opening doesn't start with "I'm reaching out" or "I hope this email finds you well"
+- [ ] The story angle is clear in the first two sentences
+- [ ] A specific exclusive or offer is named
+- [ ] Journalist's name is used (not "Hi there")
+- [ ] Mobile number included for deadline follow-up
+
+## Anti-Patterns
+
+- [ ] Do not write a pitch that leads with the company's history or description — the story angle must come first, not who the company is
+- [ ] Do not use vague data points ("significant growth", "thousands of users") — every statistic must be specific and verifiable
+- [ ] Do not send the same pitch to multiple journalists in a BCC — pitches must be individually tailored to each journalist's beat and recent work
+- [ ] Do not offer an exclusive without setting a response deadline — an open-ended exclusive invitation is ignored or used to delay indefinitely
+- [ ] Do not follow up with "just checking in" — a follow-up must contain new information or a fresh angle, otherwise it is noise
+
+## Example Trigger Phrases
+
+- "Write a media pitch for [story or announcement]"
+- "Draft a journalist outreach email for [topic]"
+- "Help me pitch [story] to [type of journalist or outlet]"
+- "What is a good angle for a media pitch about [topic]?"