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-cs/cs-escalation-brief/cs-escalation-brief.mdc

@@ -0,0 +1,185 @@
+---
+description: "Write a structured escalation brief for an at-risk customer account. Use when an account has escalated, when a customer is threatening churn, when a P1 customer issue needs executive attention, or when preparing an internal save play. Produces a crisp escalation brief with account context, timeline, root cause, business impact, and a clear resolution plan."
+globs:
+alwaysApply: false
+---
+
+# Customer Escalation Brief Skill
+
+Produce a clear, concise escalation brief that gives internal stakeholders — VP CS, CCO, product leadership, or the CEO — everything they need to understand the situation, make decisions, and act fast.
+
+A good escalation brief is not a complaint. It is a professional document that states the facts, assigns accountability honestly, and proposes a specific resolution plan.
+
+## Required Inputs
+
+Ask for these if not already provided:
+- **Account name**, tier, and ARR
+- **CSM name** and account owner
+- **Nature of the escalation** — what happened, what the customer is saying
+- **Timeline** of events leading to escalation
+- **Customer contact** who escalated (name, role, influence level)
+- **What the customer wants** — their stated ask
+- **What we believe the root cause is**
+- **What has already been done** to address the situation
+- **Renewal date** and current renewal risk assessment
+
+## Escalation Levels
+
+Calibrate urgency and audience based on escalation level:
+
+| Level | Trigger | Audience | Response time |
+|---|---|---|---|
+| L1 — Account Risk | Customer expressing dissatisfaction; renewal at risk | CSM + CS Manager | 24 hours |
+| L2 — Executive Escalation | Customer escalated to their exec; requesting vendor exec involvement | VP CS + Account Exec | 4 hours |
+| L3 — Churn Risk | Customer has issued notice or is in active churn conversation | CCO / CEO + Revenue leadership | 1 hour |
+| L4 — Public Risk | Customer threatening public escalation, legal, or press | CCO / Legal / Comms | Immediate |
+
+## Output Format
+
+---
+
+# Escalation Brief: [Account Name]
+
+**Escalation level:** L[1/2/3/4] — [Label]
+**Date raised:** [Date]
+**Raised by:** [CSM name]
+**Escalation owner:** [Name of exec or senior stakeholder now leading response]
+
+---
+
+## Account at a Glance
+
+| Field | Detail |
+|---|---|
+| ARR | £/$/€[X] |
+| Tier | Enterprise / Mid-Market / SMB |
+| Customer since | [Date] |
+| Renewal date | [Date] — [N] days away |
+| Renewal risk (pre-escalation) | Green / Amber / Red |
+| Renewal risk (current) | Green / Amber / Red |
+| Customer contact who escalated | [Name, role, seniority] |
+| Executive sponsor (customer) | [Name, role — active / passive / vacant] |
+| Executive sponsor (vendor) | [Name, role] |
+
+---
+
+## What Happened — Summary
+
+[3–5 sentences. State the facts plainly. What the customer experienced, how they reacted, and how we learned about the escalation. No editorialising. No blame.]
+
+---
+
+## Timeline
+
+List in chronological order. Each entry: `[Date / time] — [What happened. Who did what.]`
+
+Include:
+- When the original issue or trigger event occurred
+- When the customer first raised concerns (informally)
+- When it escalated (formal escalation or exec involvement)
+- Actions taken since escalation
+
+---
+
+## Root Cause
+
+**Primary cause:** [One clear sentence. What specifically went wrong.]
+
+**Contributing factors:**
+- [Factor 1 — be honest about internal failures as well as external ones]
+- [Factor 2]
+
+**Is this a systemic issue or isolated?**
+[ ] Isolated to this account
+[ ] Pattern seen in other accounts — details: [_______]
+[ ] Product or process gap that needs fixing
+
+---
+
+## Customer's Stated Position
+
+**What the customer says happened:** [Their version of events — fair and unfiltered]
+
+**What they are asking for:** [Their explicit ask — compensation, fix by date, exec call, SLA credit, exit clause]
+
+**Sentiment of escalating contact:** [Frustrated but constructive / Angry / Seeking exit / Unknown]
+
+**Risk of public escalation:** Low / Medium / High — [evidence if Medium or High]
+
+---
+
+## Business Impact
+
+| Impact type | Detail |
+|---|---|
+| ARR at risk | £/$/€[X] |
+| Potential churn probability | [X]% |
+| Reputational risk | Low / Medium / High |
+| Reference / case study status | [Was a reference — now at risk / Not a reference] |
+| Expansion pipeline at risk | £/$/€[X] |
+
+---
+
+## What Has Been Done So Far
+
+1. [Action taken — by whom — date — outcome]
+2. [Action taken — by whom — date — outcome]
+3. [Action taken — by whom — date — outcome]
+
+**Has a formal apology or acknowledgement been issued?** Yes / No
+
+---
+
+## Proposed Resolution Plan
+
+**Immediate actions (next 24–48 hours):**
+
+| Action | Owner | By when |
+|---|---|---|
+| [Action] | [Name] | [Date] |
+| [Action] | [Name] | [Date] |
+
+**Medium-term actions (next 2–4 weeks):**
+
+| Action | Owner | By when |
+|---|---|---|
+| [Action] | [Name] | [Date] |
+
+**What we are NOT offering:** [Be explicit about what is not on the table — avoids misaligned expectations]
+
+**Success criteria:** [How will we know the escalation is resolved? What does the customer need to confirm they are satisfied?]
+
+---
+
+## Decision Required from Escalation Owner
+
+[State clearly what decision or resource the escalation owner needs to provide. Be specific — do not make them ask. E.g.: "We need approval to offer a 20% service credit for Q2" or "We need an exec call with [name] within 48 hours."]
+
+---
+
+## Communication Plan
+
+| Audience | Message | Channel | Owner | By when |
+|---|---|---|---|---|
+| Escalating customer contact | [Summary of message] | Email / Call | [Name] | [Date] |
+| Customer exec sponsor | [Summary] | Call | [Name] | [Date] |
+| Internal CS team | [Summary] | Slack / Meeting | CS Manager | [Date] |
+
+---
+
+## Quality Checks
+
+- [ ] Root cause is specific — not "communication breakdown" or "product gap" without detail
+- [ ] Customer's position is stated fairly — not minimised or dismissed
+- [ ] A clear decision is requested from the escalation owner — brief does not end with "what do you think?"
+- [ ] ARR at risk is quantified
+- [ ] Communication plan has owners and dates — not "TBD"
+- [ ] Language is professional and blameless toward individuals
+
+## Anti-Patterns
+
+- [ ] Do not assign blame to individuals — focus on system failures and process gaps
+- [ ] Do not downplay ARR at risk or describe churn risk vaguely without a number
+- [ ] Do not leave resolution plan ownership as "TBD" or unassigned
+- [ ] Do not write the brief without a clear ask from the escalation owner
+- [ ] Do not omit the customer's own stated position — their perspective must be represented fairly