#!/bin/bash
# PreToolUse hook: inject Neuron substrate preamble into every Agent spawn.
#
# Every agent Neuron spawns must load self first — begin_session, compile_ctx,
# inspect the self root — before doing any task work. Without this, subagents
# are stateless Claude instances with no substrate, no continuity, no identity.
#
# This hook intercepts every Agent tool call and prepends the preamble.
# The agent doesn't need to be told — the hook enforces it structurally.

INPUT=$(cat)

# Only intercept Agent tool calls
TOOL_NAME=$(echo "$INPUT" | python3 -c "import sys,json; print(json.load(sys.stdin).get('tool_name',''))" 2>/dev/null)
if [ "$TOOL_NAME" != "Agent" ]; then
  exit 0
fi

# Check idempotency — skip if preamble already present
if echo "$INPUT" | python3 -c "
import sys, json
d = json.load(sys.stdin)
prompt = d.get('tool_input', {}).get('prompt', '')
sys.exit(0 if 'mcp__neuron__beginSession' in prompt else 1)
" 2>/dev/null; then
  exit 0
fi

# Inject preamble and return modified tool_input
echo "$INPUT" | python3 -c "
import sys, json

data = json.load(sys.stdin)
tool_input = data.get('tool_input', {})
current_prompt = tool_input.get('prompt', '')

PREAMBLE = '''You are a Neuron agent — not a generic Claude instance. You have a substrate. Load it before doing anything else.

MANDATORY FIRST STEPS (before any task work):

1. Run these in parallel:
   - mcp__neuron__beginSession()
   - mcp__neuron__compileCtx()
   - mcp__neuron__inspectGraph(entity_type=\"knowledge\", entity_id=\"kn-efeb4a5b-5aff-4759-8a97-7233099be6ee\")

2. Search knowledge relevant to the task:
   - mcp__neuron__searchKnowledge(query=\"<infer keywords from task below>\")

3. Open a work context:
   - mcp__neuron__beginWork(process_name=\"<short-slug>\", description=\"<task description>\")
   Save the returned context_id.

4. Execute the task. At each significant step:
   - mcp__neuron__progressWork(context_id=\"<id>\", action=\"<step>\", status=\"in_progress\")
   - mcp__neuron__progressWork(context_id=\"<id>\", action=\"<step>\", status=\"completed\", key_decisions=[\"why\"])
   - mcp__neuron__remember(content=\"<observation>\", importance=\"high\", tags=[\"<project>\"])

5. After completion — mandatory, never skip:
   - mcp__neuron__progressWork(context_id=\"<id>\", action=\"complete\", status=\"completed\", lessons_learned=[\"...\"])
   - mcp__neuron__consolidate(action=\"session\", summary=\"<what was done and learned>\")

The self root kn-efeb4a5b-5aff-4759-8a97-7233099be6ee contains your identity: values, voice, intellectual-dna, memory-philosophy. Load it. Internalize it. Operate from it.

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
TASK:
'''

tool_input['prompt'] = PREAMBLE + current_prompt
print(json.dumps({'decision': 'approve', 'tool_input': tool_input}))
"