refactor(linkedin): absorb authority into strategy + profile canon (S18)

- commands/strategy.md: extend frontmatter with authority triggers; insert
  Step 3.6 Authority Building (signature content map, greatest hits, derivative
  planning, content + network signals, action plan, monthly scorecard); add
  algorithm-signals-reference.md to Reference Files.
- commands/audit.md: Step 5.5 trajectory-review and Step 7 report-block
  trajectory section now route to /linkedin:strategy (the canon); Step 6
  profile-alignment routes to /linkedin:profile (the canon); drop
  trajectory-strategy-adjustments.md + algorithm-signals-reference.md from
  loaded references (canons own them).
- commands/analyze.md: 'If Profile-Content Mismatch' subsection routes to
  /linkedin:profile for the per-section checklist; quick-triage list kept.
- commands/authority.md: removed (absorbed by strategy.md).
- commands/linkedin.md: drop authority table row, merge 'Build authority'
  into AskUser item #10 (Growth strategy & authority), renumber 14-23 to
  13-22, broaden strategy routing trigger keywords, drop standalone
  authority routing rule.
- skills/linkedin-strategy/SKILL.md, skills/linkedin-thought-leadership/SKILL.md,
  CLAUDE.md, README.md: drop /linkedin:authority rows; widen /linkedin:strategy
  descriptions to reflect new scope.

Verification:
- Literal Verify (plan.md:704) exits 1 (expected inversion).
- Corrected predicate (test ! -f && ! grep -rqn …) exits 0 — clean.
- Manifest: commands/strategy.md present; [Aa]uthority match count = 24.
- Hooks: python3 hooks/scripts/compile-hooks.py --check → clean.
- Command count: 25 → 24.
- End-to-end Verification §849 (templates|publish|authority|collab|speaking)
  grep across commands/ agents/ skills/ hooks/ README.md CLAUDE.md → empty.

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

plugins/linkedin-thought-leadership/commands/strategy.md

@@ -1,13 +1,19 @@
 ---
 name: linkedin:strategy
 description: |
-  LinkedIn growth strategy based on your current follower level. Provides phase-specific
-  guidance from foundation building (0-1K) through authority establishment (10K+).
-  Use when the user wants a growth plan, asks about strategy, or wants to understand
+  LinkedIn growth strategy + authority building based on your current follower level.
+  Phase-specific guidance from foundation (0-1K) through authority establishment (10K+),
+  with trajectory-aware adjustments and signature-content compounding for Phase 2+.
+  Use when the user wants a growth plan, wants to build authority, or wants to understand
   what to focus on at their level. Triggers on: "linkedin strategy", "growth plan",
-  "how to grow on linkedin", "what should I focus on", "linkedin roadmap".
+  "how to grow on linkedin", "what should I focus on", "linkedin roadmap",
+  "build authority", "authority building", "signature content", "greatest hits",
+  "linkedin authority", "my best content".
 allowed-tools:
   - Read
+  - Glob
+  - Grep
+  - WebFetch
   - AskUserQuestion
 ---
 
@@ -277,6 +283,141 @@ Also include the phase-specific primary lever from the Phase-Specific Trajectory
 
 **If no milestone data:** Skip this step. Note: "Trajectory adjustments require follower tracking. Set `follower_count` in state file to enable."
 
+## Step 3.6: Authority Building (Phase 2+)
+
+Once the user is in Phase 2 (3,000+) the growth lever shifts from finding-what-works to compounding-what-works. Authority building is how a Phase 2/3 creator turns scattered hits into a coherent signature body of work.
+
+**Skip this section in Phase 0–1.** The signal there is consistency + voice discovery, not compounding. Reference it once they cross 3K.
+
+For the canonical profile-alignment audit (headline/About/Experience/Featured/Skills against post topics), run `/linkedin:profile` — the 360Brew checker is the single source. This section covers the content + network side of authority.
+
+### Identify Signature Content
+
+Ask the user to identify their top-performing posts (or read analytics from `${CLAUDE_PLUGIN_ROOT}/assets/analytics/`).
+
+**Signature content criteria:**
+- High saves (people bookmarking = authority signal)
+- Quality comments from target audience
+- Profile visits generated
+- Shares/reposts by others
+- Content the user is most proud of
+
+Categorize signature content per pillar:
+
+```
+Your Signature Content Map:
+
+Pillar 1: [expertise area]
+  ★ "[Post hook]" — [metrics] — [why it worked]
+  ★ "[Post hook]" — [metrics] — [why it worked]
+
+Pillar 2: [expertise area]
+  ★ "[Post hook]" — [metrics] — [why it worked]
+
+[Continue for all pillars]
+
+Missing: [Pillars with no signature content yet]
+```
+
+### Greatest Hits Schedule
+
+Create a strategic repost/refresh schedule:
+
+```
+Greatest Hits Calendar (Monthly):
+
+Week 1: Fresh content
+Week 2: Refresh "[best post]" with new angle
+Week 3: Fresh content
+Week 4: Refresh "[second best post]" with updated data
+
+Rules:
+- Minimum 60 days between original and refresh
+- Always add new insight or updated data
+- Change the hook (same core message)
+- Reference the original: "I wrote about X last month. Since then..."
+```
+
+### Derivative Content Planning
+
+For each piece of signature content, suggest derivatives:
+
+```
+Derivative Content Map:
+
+Original: "[Signature post]"
+├── Carousel: Deep-dive into the framework
+├── Article: Long-form with case studies
+├── Series: 3-post series expanding each point
+├── Video: 90-second explanation
+└── Newsletter: Comprehensive guide
+```
+
+Use AskUserQuestion to pick which derivatives to create.
+
+### Authority Signals Audit (Content + Network)
+
+**Profile signals:** delegated to `/linkedin:profile` (canonical 360Brew audit).
+
+**Content authority:**
+- [ ] Consistent posting in expertise areas
+- [ ] Building on previous posts (referencing own work)
+- [ ] Attracting expert-level comments
+- [ ] Being shared by others in the field
+- [ ] Growing follower base of target audience
+
+**Network authority:**
+- [ ] Connected with key people in niche
+- [ ] Engaging with other thought leaders
+- [ ] Tagged or mentioned by others
+- [ ] Invited to contribute/speak
+
+### Authority Building Action Plan
+
+Present prioritized actions horizoned by impact:
+
+```
+Authority Building Action Plan:
+
+Immediate (This Week):
+1. [Highest-impact action]
+2. [Quick win]
+
+Short-term (This Month):
+3. [Build on signature content]
+4. [Network expansion]
+
+Medium-term (This Quarter):
+5. [Content series or deep-dive]
+6. [Collaboration opportunity]
+
+Long-term (6 Months):
+7. [Thought leadership milestone]
+8. [Platform expansion]
+```
+
+### Monthly Authority Scorecard
+
+Suggest tracking these monthly:
+
+```
+Authority Scorecard: [Month]
+
+Content Impact:
+- Posts with 100+ saves: [count]
+- Expert comments received: [count]
+- Profile visits from content: [count]
+
+Network Growth:
+- New connections in target niche: [count]
+- Mentions/tags by others: [count]
+- Collaboration invitations: [count]
+
+Milestone Progress:
+- [Next follower milestone]: [current] / [target]
+- [Content goal]: [progress]
+```
+
 ## Step 4: Address Common Stall Points
 
 Based on where they're stuck:
@@ -375,6 +516,7 @@ Remind them of the long-term view:
 - `references/growth-roadmaps.md` - Detailed phase roadmaps
 - `references/linkedin-growth-playbook-2025-2026.md` - Comprehensive tactics
 - `references/trajectory-strategy-adjustments.md` - Trajectory-based strategy adjustments
+- `references/algorithm-signals-reference.md` - 360Brew signals (authority audit)
 - `references/collaborations-guide.md` - Partnership strategies
 - `references/opportunity-generation.md` - Business development
 - `references/newsletter-strategy-guide.md` - For 5K+ followers