feat: add plan skill — comprehensive AARRR marketing plan generator

A new skill (`/plan {client-name}`) that produces an exhaustive 13-section
Notion-paste-ready marketing plan structured by AARRR (Acquisition,
Activation, Retention, Referral, Revenue), customized to the client's
current budget, team, stage, and tooling stack, mapped to future
funding-stage capability unlocks.

Three-phase workflow:
- INIT: research + structured 10-topic intake; pulls data from wired
  MCPs (Ahrefs, GA4, Stripe, Customer.io, etc.); offers to run
  /audit-marketing first
- REVIEW: section-by-section interactive draft with user confirmation
  on each of the 13 sections; resumable across sessions
- FINALIZE: compile, verification pass (cross-references, machine paths,
  brand voice), and optional publish to a shared GitHub repo

The 13 sections:
1. Executive summary
2. Strategic frame
3. Current state (scored against the 17-section audit-marketing rubric)
4. Acquisition
5. Activation
6. Retention
7. Referral
8. Revenue
9. 90-day roadmap (AARRR-tagged, owner-assigned)
10. 12-month outlook (with funding-stage milestones)
11. Marketing operations stack (skills + MCPs per AARRR stage)
12. Tactical idea bank (all 139 ideas from `marketing-ideas` mapped to
    AARRR + client-specific status: Now / Q2 / Q3+ / Q4+ / Skip)
13. Measurement, RACI, open decisions, appendix

References:
- methodology.md — full three-phase workflow
- plan-template.md — 13-section template with per-section guidance
- aarrr-framework.md — AARRR primer + diagnostic rules for which stage
  is the binding constraint
- current-state-rubric.md — 17-section audit-marketing rubric mapped
  to AARRR
- ops-stack-mapping.md — all 26+ marketing skills + MCP/API integrations
  mapped to AARRR stages
- idea-cross-reference.md — all 139 marketing-ideas mapped to AARRR
  with timing defaults
- funding-stage-unlocks.md — 5 standard funding tiers (pre-seed through
  Series B+) with budget profiles and capability unlocks
- measurement-framework.md — north-star patterns by business model,
  leading indicators by AARRR stage, review cadence
- client-types.md — variations by client archetype (B2B SaaS, D2C
  consumer app, hybrid hardware+software, marketplace, dev tool,
  deep-tech/clinical, commerce)
- example-olo.md — canonical reference plan from a real fCMO engagement

Updates:
- plugin.json + marketplace.json bumped to 2.3.0
- marketplace description updated to 43 skills
- VERSIONS.md entry added

Total skills: 43.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

VERSIONS.md

@@ -32,6 +32,7 @@ Current versions of all skills. Agents can compare against local versions to che
 | ads | 2.0.1 | 2026-05-26 |
 | paywalls | 2.0.0 | 2026-05-05 |
 | popups | 2.0.0 | 2026-05-05 |
+| plan | 1.0.0 | 2026-05-27 |
 | pricing | 2.0.0 | 2026-05-05 |
 | product-marketing | 2.0.0 | 2026-05-05 |
 | programmatic-seo | 2.0.0 | 2026-05-05 |
@@ -49,6 +50,11 @@ Current versions of all skills. Agents can compare against local versions to che
 
 ## Recent Changes
 
+### 2.3.0 (2026-05-27)
+
+- Added `plan` skill — comprehensive AARRR-structured marketing plan generator. Produces a 13-section Notion-paste-ready plan document (executive summary, strategic frame, current state, AARRR breakdown, 90-day roadmap, 12-month outlook with funding-stage capability unlocks, marketing operations stack mapping skills + MCPs to AARRR stages, tactical idea bank cross-referencing all 139 `marketing-ideas` to AARRR + client-specific status, measurement framework, RACI, open decisions). Customized for current budget, team, stage, and tooling stack. Three-phase workflow: INIT (research + intake), REVIEW (section-by-section walkthrough), FINALIZE (compile + verify + optional publish to shared repo). References include methodology, plan-template, aarrr-framework, current-state-rubric (mapping CF's audit-marketing 17-section rubric), ops-stack-mapping, idea-cross-reference (139-idea AARRR mapping), funding-stage-unlocks, measurement-framework, client-types (variations by B2B SaaS / D2C / hardware-hybrid / marketplace / dev tool / clinical / commerce), and example-olo (canonical reference plan from a real fCMO engagement).
+- Total skills: 43.
+
 ### 2.2.0 (2026-05-26)
 
 - Added `prospecting` skill for building qualified prospect lists across SaaS, B2B, and local SMB motions. Includes shared 5-phase framework (ICP → discovery → qualify → score → output) plus branch-specific references (saas-prospecting, b2b-prospecting, local-prospecting), data-sources guide covering Apollo / Clay / ZoomInfo / Clearbit / Hunter / Snov / Truelist / RB2B / Sales Nav / BuiltWith / Crunchbase / GitHub, and compliance reference (CAN-SPAM, GDPR, CASL, platform ToS).