fix: remove automatic DeepPlan injection from startup hook

The startup_context hook was injecting an instruction forcing agents
into the DeepPlan workflow whenever they entered plan mode. Remove
the injection, deprecate the corresponding requirement (JOBS-REQ-014.5.1),
and drop the test that enforced it.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: nhorton

plugins/claude/hooks/startup_context.sh

@@ -31,10 +31,6 @@ if [ -n "$AGENT_ID" ]; then
   CTX="${CTX}"$'\n'"CLAUDE_CODE_AGENT_ID=$AGENT_ID"
 fi
 
-# Inject DeepPlan trigger for planning mode
-DEEPPLAN_MSG="When you enter plan mode and begin working on a plan, start the DeepWork workflow create_deep_plan (job: deepplan) via start_workflow before doing anything else. The workflow will guide you through structured planning. Its instructions supersede the default planning phases."
-CTX="${CTX}"$'\n'"${DEEPPLAN_MSG}"
-
 # ==== Output hook response ====
 jq -n --arg ctx "$CTX" --arg event "$EVENT_NAME" \
   '{ hookSpecificOutput: { hookEventName: $event, additionalContext: $ctx } }'

specs/deepwork/jobs/JOBS-REQ-014-deepplan.md

@@ -39,7 +39,7 @@ DeepPlan is a standard job that provides a structured planning workflow. When an
 
 ### JOBS-REQ-014.5: Planning Mode Integration
 
-1. The startup context hook MUST inject an instruction telling agents to start the `create_deep_plan` workflow when entering plan mode.
+1. ~~DEPRECATED~~ ~~The startup context hook MUST inject an instruction telling agents to start the `create_deep_plan` workflow when entering plan mode.~~
 2. The `present_plan` step MUST instruct the agent to call `ExitPlanMode` instead of `finished_step`.
 3. The plan file MUST include execution instructions telling the post-approval agent to call `finished_step` on `present_plan` and then `start_workflow` on the session job.
 

tests/unit/jobs/test_deepplan.py

@@ -94,24 +94,13 @@ def test_required_step_arguments(self) -> None:
 
 
 class TestDeepplanStartupHook:
-    """Validate the startup context hook injects DeepPlan trigger."""
-
-    # THIS TEST VALIDATES A HARD REQUIREMENT (JOBS-REQ-014.5.1).
-    # YOU MUST NOT MODIFY THIS TEST UNLESS THE REQUIREMENT CHANGES
-    def test_startup_hook_contains_deepplan_trigger(self) -> None:
-        """startup_context.sh injects an instruction to start create_deep_plan."""
-        content = _STARTUP_HOOK.read_text(encoding="utf-8")
-        assert "create_deep_plan" in content
-        assert "deepplan" in content
-        assert "start_workflow" in content
+    """Validate the startup context hook basics."""
 
     @pytest.mark.skipif(
         not _STARTUP_HOOK.exists(),
         reason="startup_context.sh not found",
     )
     def test_startup_hook_is_executable(self) -> None:
-        # THIS TEST VALIDATES A HARD REQUIREMENT (JOBS-REQ-014.5.1).
-        # YOU MUST NOT MODIFY THIS TEST UNLESS THE REQUIREMENT CHANGES
         """startup_context.sh has execute permission."""
         import os