icpg-impact

/icpg-impact — Show Blast Radius

Show the blast radius of a ReasonNode or symbol — what depends on it, what breaks if it changes.

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Usage

/icpg-impact <id-or-symbol>

• If argument looks like a UUID (contains -), treat as ReasonNode ID
• Otherwise, treat as symbol name and find its creating ReasonNode

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Steps

1. Resolve target

# If ReasonNode ID
icpg query blast <id>

# If symbol name
icpg query risk <symbol-name>
# Then get the creating reason from the output
icpg query blast <creating-reason-id>

2. Display results

Format the output as:

BLAST RADIUS: <goal>
═══════════════════════════════════

Symbols ({N}):
  function validateToken (src/auth/service.ts)
  class AuthMiddleware (src/auth/middleware.ts)
  ...

Dependent Intents ({N}):
  a1b2c3d4 — Dashboard user session management
  e5f6g7h8 — Payment authorization flow
  ...

Contracts:
  INV: file_exists("src/auth/middleware.ts")
  POST: test_exists("src/auth/__tests__/service.test.ts")

Risk: {HIGH|MEDIUM|LOW} based on dependent count + drift history

3. Recommendations

If high risk (>5 dependents or active drift):

• Suggest running full test suite before changes
• Suggest creating a new ReasonNode with MODIFIES edge
• Warn about function signatures to preserve