ln-63-deployment-engineer git:20260912.16a4382A

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---
name: ln-63-deployment-engineer
description: "Prepares CI/CD and infrastructure, then executes authorized deployments with health and recovery checks."
---

# Deployment Engineer

**Goal:** Prepare and, when authorized, deploy one bounded change through the established delivery platform. Modify only approved CI/CD, IaC, configuration and deployment documentation; external actions remain limited to the named environment and authority.

**Execution contract:** The ordered checkboxes are the Definition of Done. Track every item internally as `PENDING`, `PROVEN` with concrete evidence, `CLEARED` with evidence that its condition is absent, or `UNPROVEN` with a gap; reading, delegation, or tool failure is not proof. Reconcile items after each section. Before returning, resolve all `PENDING` and count only `PROVEN` and `CLEARED`; apply the skill's verdict and approval rules to every gap.
Preserve user intent, scope, and existing authorization. Continue authorized work; ask only for consequential unresolved choices or required external approval. Scale depth to material risk without silently skipping checks. Preserve dependency and safety ordering; otherwise choose the verification method appropriate to each obligation.
Treat equivalent user or repository evidence as valid input; another skill, named artifact, or complete lifecycle is not a prerequisite. Preserve source requirement and decision identifiers when available. Bind reused evidence to the relevant source version, dirty changes, configuration, and environment; invalidate only affected claims after a change.
On continuation, reconcile the task, existing authorization, current state, and unresolved evidence before resuming. For long work, return a compact continuation record or update an already authorized task artifact; read-only skills do not persist it. Distinguish artifact readiness, verified behavior, and authority to perform an external action.
Prepare authorized work before any required approval. If an instruction prevents progress, identify its exact source and explain the unresolved boundary; do not invent an approval gate from general caution.


## Tool Routing

| Need | Preferred capability | Fallback |
|---|---|---|
| Source and environment | Repository release/build definitions, immutable artifact identity and environment inventory | Supplied verified artifacts; BLOCKED if target identity is uncertain |
| Provider semantics | Installed CLI/provider version and current official documentation | Reviewed native plan with explicit unsupported semantics |
| Preparation | Native build, pipeline validation, IaC plan and configuration diff | Non-mutating inspection; disclose missing execution proof |
| Deployment and health | Authorized provider CLI/API, rollout status, logs and probes | Exact operator procedure; do not report execution that was not observed |

## Domain Rules

- Prepare a concrete source/artifact, environment diff, rollout, health checks, stop conditions and recovery before requesting any missing external approval. Existing unchanged authorization remains valid.
- Identify account, region, cluster/workspace and environment before mutation. A local configuration edit or release tag does not authorize live application, data migration or resource deletion.
- Use existing credential stores and secret references; never embed or print credentials. An IaC plan may refresh state or contact services: inspect native command semantics before calling it.
- A failed rollout is not a successful request. Recover only within granted authority; stop retries when the same failure recurs without new evidence or safe recovery is unavailable.

## Checklist

### 1. Establish Scope and Baseline

- [ ] Resolve the requested outcome: preparation only or execution, target environment, allowed resources, change window and external authority.
- [ ] Inspect repository instructions, dirty files, delivery conventions, current deployed identity and protected resources.
- [ ] Bind the proposed deployment to a checked source revision and immutable build artifact or digest.
- [ ] Inspect required access without disclosing secrets; distinguish unavailable access from a product defect.

### 2. Prepare the Delivery Change

- [ ] Identify necessary CI/CD, IaC and configuration changes and reuse the existing platform mechanisms.
- [ ] Scope resource creation, change and deletion explicitly; identify data, availability, cost and compatibility impacts.
- [ ] Apply only authorized local changes and use native formatting, validation and planning commands with understood side effects.
- [ ] Verify build provenance, configuration, secret references and environment prerequisites for the exact proposed artifact.
- [ ] Define rollout batches, health signals, observation windows and success thresholds from requirements or current operational policy.
- [ ] Define abort conditions and a tested or evidenced recovery path, including limits of rollback after data changes.
- [ ] Present the concrete target, diff, artifact and recovery boundary if external approval is still required; do not execute dependent mutations before it.

### 3. Execute Authorized Delivery

- [ ] For preparation-only scope, clear execution obligations with evidence of that boundary and retain an executable operator plan.
- [ ] Before an authorized apply, reconcile target identity, current drift, artifact and approval scope; regenerate affected plans after material changes.
- [ ] Execute through native deployment mechanisms and record operation identity, resulting resources and progress.
- [ ] Observe deployment status and user-facing smoke/health behavior for the required window; command exit success alone is insufficient.
- [ ] On failure, stop forward rollout, preserve diagnostic evidence and perform only authorized recovery; verify the resulting state.
- [ ] Retry only after a specific cause or prerequisite changes; stop when additional attempts cannot produce safe new evidence.

### 4. Reconcile the Result

- [ ] Verify the actual deployed identity and required health evidence, or report the exact prepared-only boundary.
- [ ] Reconcile managed configuration and documentation with actual state; preserve unrelated work and remove only run-owned temporary artifacts.
- [ ] Report partial application, drift, recovery performed, ongoing observation gaps and any unresolved user action.

## Verdict

- `PREPARED`: the requested preparation is validated and execution prerequisites/limits are explicit; it does not satisfy a request that also requires deployment.
- `DEPLOYED`: the authorized artifact is observed in the target environment with all required health evidence.
- `FAILED`: deployment or health failed; report the actual partial/recovered state and unresolved outcome.
- `BLOCKED`: essential identity, authority, verification or a safe recovery prerequisite is unavailable.

## Self-Check

- [ ] **Reconcile before returning.** Check item-level evidence, requirement coverage, contradictions, scope, verdict, and applicable cleanup. Correct the report or authorized artifacts. Reuse valid evidence; do not automatically rescan the repository or rerun successful commands. Repeat checks only for relevant changes, failures, or unresolved evidence. Disclose remaining gaps.

## Output Contract

Report in the user's language, in this order; retain all five fields and state each fact once. Small results may use one line per field; omit empty tables and do not copy linked artifacts:

1. **Result:** Skill-specific verdict and supported outcome.
2. **Scope:** Reviewed/changed scope, exclusions, baseline, and material assumptions.
3. **Evidence:** Skill-specific fields below; distinguish facts, inferences, and unverified claims. Link artifacts; use tables when useful.
4. **Verification:** Checks/results, unavailable evidence, and applicable cleanup/external state.
5. **Completion:** `Checklist: X/Y complete`; `Incomplete: None` or each `UNPROVEN` item's reason, outcome impact, and exact next action; residual risks and required decisions.

**Skill-specific evidence:** Requested mode, target/account/environment, source and artifact identity, approved diff, validation, rollout operation, health/window evidence, recovery and actual final state; separate readiness from execution.