From silver-bullet
Assesses blast radius of infrastructure or DevOps changes by mapping change scope, downstream dependencies, failure scenarios, rollback plans, and change window risks before planning.
How this skill is triggered — by the user, by Claude, or both
Slash command
/silver-bullet:silver-blast-radiusThe summary Claude sees in its skill listing — used to decide when to auto-load this skill
Performs a structured pre-change risk analysis before any infrastructure or
Performs a structured pre-change risk analysis before any infrastructure or DevOps change proceeds to quality gates or planning. Every field must be filled. Vague answers ("unknown", "TBD") are not acceptable — investigate until concrete.
List every resource this change will touch:
| Resource | Action | Environment |
|---|---|---|
(e.g. k8s/deployment/api) | CREATE / MODIFY / DELETE | dev / staging / prod |
Include:
For each resource being modified or deleted, list what depends on it:
| Resource changed | Downstream dependents | Coupling type |
|---|---|---|
| (resource name) | (services/systems that use it) | Hard / Soft / None |
Coupling types:
For each resource with Hard or Soft coupling, describe what breaks:
| Resource | Failure mode | Impact | Affected users/systems |
|---|---|---|---|
| (resource) | (what breaks) | (severity: P1/P2/P3) | (who is affected) |
| Step | Action | Time estimate | Data loss risk |
|---|---|---|---|
| 1 | (first rollback action) | (e.g. 2 min) | None / Low / Medium / High |
| 2 | ... | ... | ... |
Rollback must be:
Answer each question:
Rate the overall change using this rubric:
| Rating | Criteria |
|---|---|
| 🟢 LOW | Single resource, no hard dependents, instant rollback, off-peak |
| 🟡 MEDIUM | ≤3 resources, soft dependents only, rollback <10 min, low traffic |
| 🟠 HIGH | Multiple resources OR any hard dependent OR rollback >10 min OR peak hours |
| 🔴 CRITICAL | Prod data mutation, IAM/secret rotation, DNS cutover, >5 hard dependents, no tested rollback |
Output the completed assessment, then apply the gate:
🟢 LOW → Proceed to /devops-quality-gates.
🟡 MEDIUM → Proceed to /devops-quality-gates. Note: ensure rollback is documented.
🟠 HIGH → STOP. Present the assessment to the user. Require explicit approval before proceeding. If approved, require a runbook before execution.
🔴 CRITICAL → HARD STOP. Output:
❌ CRITICAL blast radius. This change requires Change Advisory Board (CAB) review and an approved change request before proceeding. Do NOT continue until CAB approval is confirmed by the user.
Do not proceed to quality gates or planning until the user explicitly confirms CAB approval.
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