fix(docs): address review feedback on architecture clarity and path consistency

- Clarify SPAWN exits vs HANDOFF continues in architecture diagram (S1)
- Add 'read' to toolsAllow in architecture snippet to match cron config (G2)
- Rephrase safety invariant 6 to clarify workers may push/manage labels (G3)
- Add reserved Rule 1 placeholder to explain numbering gap (S2)
- Clarify Rule 10 skip behavior for already-assigned PRs (S3)
- Standardize invariants checker path to full workspace path (G4/G5)
- Add note explaining SKILL.md deployment to workspace path (G1)

docs/dev-loop-spec.md

@@ -204,7 +204,7 @@ If all current:
 - Emit `HANDOFF:<pr_num>`
 - Continue evaluating remaining PRs (do NOT exit)
 
-If already assigned to `aweiker`: skip.
+If already assigned to `aweiker`: skip (assume handoff was already performed; continue to next PR without emitting another HANDOFF).
 
 ### Rule 11: New Issue Pickup
 
@@ -219,7 +219,7 @@ Claim the issue (assign to bot user to prevent double-pick), then:
 
 ## 6. Safety Invariants
 
-These are statically checked by `test/check-invariants.sh` and enforced in all changes:
+These are statically checked by `~/.openclaw/workspace/scripts/test/check-invariants.sh` and enforced in all changes:
 
 | ID | Invariant |
 |----|-----------|
@@ -268,7 +268,7 @@ Workers **always** remove the WIP label on completion and reply `NO_REPLY`.
 ## 9. Fixes for Issues #144 and #145
 
 **Issue #144** (autonomous merge):
-The dispatch script contains no merge API calls anywhere. The `scripts/test/check-invariants.sh`
+The dispatch script contains no merge API calls anywhere. The `~/.openclaw/workspace/scripts/test/check-invariants.sh`
 invariant `S1` verifies this. Workers do not receive merge instructions.
 
 **Issue #145** (merged despite REQUEST_CHANGES):