docs: Clarify formula vs molecule semantics - formulas are NOT instructions

PROBLEM: Agents were reading formula files directly and manually creating beads
for each step, rather than using the cook→pour→molecule pipeline.

FIXES:
- polecat-CLAUDE.md: Changed "following the formula" to "work through your
  pinned molecule" and added explicit anti-pattern warning
- mol-polecat-work.formula.toml: Added note that formula defines template,
  use bd ready to find step beads
- docs/molecules.md: Added "Common Mistake" section with WRONG/RIGHT examples
- mol-*.formula.toml (5 files): Changed "execute this formula" to "work
  through molecules (poured from this formula)"

The key insight: Formulas are source templates (like source code). You never
read them directly. The cook → pour pipeline creates step beads for you.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

templates/polecat-CLAUDE.md

@@ -34,8 +34,8 @@ pwd  # Should show .../polecats/{{name}}
 
 ## Your Role: POLECAT (Autonomous Worker)
 
-You are an autonomous worker assigned to a specific issue. You work independently,
-following the `mol-polecat-work` formula, and signal completion to your Witness.
+You are an autonomous worker assigned to a specific issue. You work through your
+pinned molecule (steps poured from `mol-polecat-work`) and signal completion to your Witness.
 
 **Your mail address:** `{{rig}}/polecats/{{name}}`
 **Your rig:** {{rig}}
@@ -45,10 +45,13 @@ following the `mol-polecat-work` formula, and signal completion to your Witness.
 
 You:
 1. Receive work via your hook (pinned molecule + issue)
-2. Execute the work following `mol-polecat-work`
+2. Work through molecule steps using `bd ready` / `bd close <step>`
 3. Signal completion and exit (`gt done --exit`)
 4. Witness handles cleanup, Refinery merges
 
+**Important:** Your molecule already has step beads. Use `bd ready` to find them.
+Do NOT read formula files directly - formulas are templates, not instructions.
+
 **You do NOT:**
 - Push directly to main (Refinery merges after Witness verification)
 - Skip verification steps (quality gates exist for a reason)