fix: add explicit wait-for-subagent instructions in orchestration workflows (#2755)
Adds ORCHESTRATOR RULE blockquotes immediately after every Task() spawn in 26 GSD workflow files, instructing the parent orchestrator to stop working on the task while the subagent is active. This prevents the parallel-work anti-pattern on Codex runtime where the parent continues reading files and producing duplicate/conflicting output after spawning. Rules are placed inline at each spawn point (not as generic headers) so they are adjacent to and unambiguously associated with each Task() call. Background Task() spawns get a variant noting not to return to the spawning context until the subagent reports back. Closes #2729 Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
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@@ -391,6 +391,8 @@ Task(
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```
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> **ORCHESTRATOR RULE — CODEX RUNTIME**: After calling Task() above, stop working on this task immediately. Do not read more files, edit code, or run tests related to this task while the subagent is active. Wait for the subagent to return its result. This prevents duplicate work, conflicting edits, and wasted context. Only resume when the subagent result is available.
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### Handle Researcher Return
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- **`## RESEARCH COMPLETE`:** Display confirmation, continue to step 6
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@@ -685,6 +687,8 @@ Task(
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```
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> **ORCHESTRATOR RULE — CODEX RUNTIME**: After calling Task() above, stop working on this task immediately. Do not read more files, edit code, or run tests related to this task while the subagent is active. Wait for the subagent to return its result. This prevents duplicate work, conflicting edits, and wasted context. Only resume when the subagent result is available.
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**Handle return:**
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- **`## PATTERN MAPPING COMPLETE`:** Update `PATTERNS_PATH` to the created file path, continue to step 8.
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- **Any error or empty return:** Log warning, continue to step 8 without patterns (non-blocking).
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@@ -815,6 +819,8 @@ Task(
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```
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> **ORCHESTRATOR RULE — CODEX RUNTIME**: After calling Task() above, stop working on this task immediately. Do not read more files, edit code, or run tests related to this task while the subagent is active. Wait for the subagent to return its result. This prevents duplicate work, conflicting edits, and wasted context. Only resume when the subagent result is available.
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**If `CHUNKED_MODE` is `true`:** Skip the Task() call above — proceed to step 8.5 instead.
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## 8.5. Chunked Planning Mode
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@@ -869,6 +875,8 @@ Task(
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)
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```
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> **ORCHESTRATOR RULE — CODEX RUNTIME**: After calling Task() above, stop working on this task immediately. Do not read more files, edit code, or run tests related to this task while the subagent is active. Wait for the subagent to return its result. This prevents duplicate work, conflicting edits, and wasted context. Only resume when the subagent result is available.
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Handle return:
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- **`## OUTLINE COMPLETE`:** Read `PLAN-OUTLINE.md`, extract plan list. Continue to 8.5.2.
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- **Any other return or empty:** Display error. Offer: 1) Retry outline, 2) Stop.
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@@ -911,6 +919,8 @@ For each plan entry extracted from `PLAN-OUTLINE.md`:
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)
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```
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> **ORCHESTRATOR RULE — CODEX RUNTIME**: After calling Task() above, stop working on this task immediately. Do not read more files, edit code, or run tests related to this task while the subagent is active. Wait for the subagent to return its result. This prevents duplicate work, conflicting edits, and wasted context. Only resume when the subagent result is available.
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4. **Verify disk:** Check `${PHASE_DIR}/{plan_id}-PLAN.md` exists. If missing: offer 1) Retry, 2) Stop.
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5. **Commit per-plan:**
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@@ -1067,6 +1077,8 @@ Task(
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)
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```
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> **ORCHESTRATOR RULE — CODEX RUNTIME**: After calling Task() above, stop working on this task immediately. Do not read more files, edit code, or run tests related to this task while the subagent is active. Wait for the subagent to return its result. This prevents duplicate work, conflicting edits, and wasted context. Only resume when the subagent result is available.
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## 11. Handle Checker Return
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- **`## VERIFICATION PASSED`:** Display confirmation, proceed to step 13.
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@@ -1180,6 +1192,8 @@ Task(
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)
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```
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> **ORCHESTRATOR RULE — CODEX RUNTIME**: After calling Task() above, stop working on this task immediately. Do not read more files, edit code, or run tests related to this task while the subagent is active. Wait for the subagent to return its result. This prevents duplicate work, conflicting edits, and wasted context. Only resume when the subagent result is available.
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After planner returns -> spawn checker again (step 10), increment iteration_count.
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**If iteration_count >= 3:**
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