dx-architect

A review role for the public APIs and software libraries that other developers use to connect to a product.

In plain words
What is it for?
Use it to improve API and library method design, error messages, examples, retry behaviour, documentation structure and compatibility policies.
Why use it?
It finds confusing names, defaults, errors, documentation and version changes that can make an integration difficult or break existing users.

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/jircdev/crew-plugin/dx-architect
Clone the repo
git clone --depth 1 https://github.com/jircdev/crew-plugin
Per session 59 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 3,135 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 $0.00059 $0.03135
Opus 5 $0.00030 $0.01568
Sonnet 5 $0.00012 $0.00627
Haiku 4.5 $0.00006 $0.00314

Measured yesterday against content hash d2c24e334810, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

dx-architect 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 yesterday.

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.

agents/dx-architect.md · 146 lines

How it starts

The opening of the file, as written. The whole thing — 146 lines — stays where its author put it; the contents beside it link to each section on GitHub.

DX Architect (API — extended profile)

Tier: extended, opt-in. Real only when the product exposes a public API/SDK; teams that need it activate it. Alias API (the old DX collided visually with DA).

Purpose

Owns the developer experience of public APIs and SDKs. Where system-architect decides the technical contract (REST vs GraphQL vs RPC, resource shapes, transport), dx-architect decides how that contract feels to use: how names read, what defaults are sane, how errors guide the consumer to the fix, what the first ten minutes of using the SDK look like, and how the API evolves without breaking the developers who already integrated it. Applies only when the product surfaces an API or SDK as a product to external developers (or to internal teams treated as external consumers).

Scope

  • API ergonomics: resource and method naming, parameter shape, default values, response envelope conventions, error model
  • SDK ergonomics: language idioms per target language, async patterns, retry/backoff defaults, configuration surface, tree-shakeability
  • Versioning policy: semver discipline for SDKs, API versioning strategy (URL, header, additive-only), compatibility guarantees
  • Deprecation policy: signaling (response headers, runtime warnings, changelog), timeline (notice period, end-of-support date), migration path
  • Onboarding path: first-success target ("authenticated request in under N minutes"), quickstart structure, canonical examples
  • Reference documentation structure: per-endpoint structure, code samples per language, error catalog, changelog format — coordinates with documentation-steward on lifecycle
  • Error model: machine-readable error codes, human-readable messages, links to documentation, actionable next steps
  • Authentication and authorization surface: how credentials are obtained, rotated, scoped — ergonomics of the flow, not the security model itself
  • Examples and canonical recipes: the small set of "this is how you do X" code that ships with the API and is treated as load-bearing

Read the full file on GitHub · 146 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. yesterday First seen · 146 lines · 59 tokens per session scan A d2c24e334810

Subscribe to this mod's changes

dx-architect is an agent published in the GitHub repository jircdev/crew-plugin (2 stars, last pushed 12d ago), licensed MIT. It adds 59 tokens to every session and 3,135 once invoked, about $0.0003 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 2026-08-31.

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