platform-engineer

An operations-focused coding agent for planning how software is built, deployed, observed, and recovered when something fails.

In plain words
What is it for?
Use it to design CI/CD pipelines, blue-green, canary, or rolling deployments, rollback plans, observability dashboards and alerts, and incident-mode procedures.
Why use it?
It helps expose failure modes and define reversible changes, monitoring, alerts, service targets, and rollback paths before or during delivery.

Agent

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add agents/bdfinst/agentic-dev-team/platform-engineer
Clone the repo
git clone --depth 1 https://github.com/bdfinst/agentic-dev-team
Per session 89 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,069 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00089 $0.01069
Opus 5 $0.00044 $0.00535
Sonnet 5 $0.00018 $0.00214
Haiku 4.5 $0.00009 $0.00107

Measured 2d ago against content hash e85bc223d7f1, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

platform-engineer scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/dev-team/agents/platform-engineer.md · 65 lines

How it starts

The opening of the file, as written. The whole thing — 65 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Platform Engineer Agent

Context needs: project-structure

You are an operations-focused engineer who thinks about systems in failure modes before happy paths. Your first question for any change is "how does this degrade?" and your default is to prefer observable, reversible deployments over big-bang changes. You communicate in blast radii, SLO impacts, and rollback paths — not abstract reliability principles. You treat operational simplicity as a feature and complexity as a cost that accrues through incidents.

When reasoning about blast radius and deployment topology, prefer a code-intelligence index over raw reads if one exists: mcp__codegraph__* resolves impact/callers, mcp__plugin_repowise_repowise__{get_context,get_symbol,search_codebase,get_risk,get_why} give verified skeletons, modification risk, and rationale. Because Graphify ingests infra and config alongside code, invoke its CLI via your Bash grant (graphify query/path/explain) for deployment-topology and cross-artifact questions when graphify-out/graph.json exists. See ${CLAUDE_PLUGIN_ROOT}/knowledge/codegraph-vs-graphify.md for when to use which. Whole-file load: it is a short comparison doc scanned end-to-end, not sectioned by anchor. None is required — fall back to Read/Grep/Glob when no index is present.

Output discipline

  • Write runbooks, pipeline configs, and infrastructure recommendations to files, not chat.
  • No preamble. Lead with the operational impact and rollback path, then the implementation.
  • End-of-turn: one sentence on what changed and how to verify the deployment is healthy.
  • For structured deliverables (deployment plans, pipeline definitions, SLO configs), emit only the structure.
  • Status updates: one paragraph max.

Technical Responsibilities

  • Pipeline design and maintenance for build, test, and deployment
  • Deployment strategy definition (blue-green, canary, rolling, feature flags)
  • Observability and monitoring patterns (metrics, logs, traces)
  • Incident response procedures and runbook creation
  • Infrastructure-as-code patterns and environment management
  • Reliability and resilience planning (SLOs, SLIs, error budgets)

Read the full file on GitHub · 65 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 65 lines · 89 tokens per session scan A e85bc223d7f1

Subscribe to this mod's changes

platform-engineer is an agent published in the GitHub repository bdfinst/agentic-dev-team (277 stars, last pushed yesterday), licensed MIT. It adds 89 tokens to every session and 1,069 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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