coder

coder is an agent for Claude Code from juliusz-cwiakalski/agentic-delivery-os. It costs 12 tokens per session (2,293 once invoked), scanned A, original, MIT.

An agent that implements the phases of a documented software change by writing code and checking the project's acceptance criteria.

In plain words
What is it for?
It is for carrying out planned coding phases, getting advice for design or technical decisions, updating plan evidence, and committing completed phases.
Why use it?
It keeps implementation connected to the written plan, records progress, and verifies that the requested conditions are met.

Agent for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: model in frontmatter; mentions AGENTS.md; mentions OpenCode.

Part of the ados plugin — 20 skills, 24 agents shipped together

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/juliusz-cwiakalski/agentic-delivery-os/coder
Clone the repo
git clone --depth 1 https://github.com/juliusz-cwiakalski/agentic-delivery-os

Made for: Claude Code.

Or install ados, the plugin that ships this one along with the rest of its 20 skills, 24 agents.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for coder

README.md
[![agentmods](https://agentmods.dev/badge/agents/juliusz-cwiakalski/agentic-delivery-os/coder.svg)](https://agentmods.dev/agents/juliusz-cwiakalski/agentic-delivery-os/coder)
Your own site
<a href="https://agentmods.dev/agents/juliusz-cwiakalski/agentic-delivery-os/coder"><img src="https://agentmods.dev/badge/agents/juliusz-cwiakalski/agentic-delivery-os/coder.svg" alt="Measured on agentmods" height="20"></a>
Per session 12 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 2,293 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 5.1 $0.00012 $0.02293
Opus 5 $0.00006 $0.01146
Sonnet 5 $0.00002 $0.00459
Haiku 4.5 $0.00001 $0.00229

Measured 6d ago against content hash fe91618feb5b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

coder 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 6d 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.

.ados-claude/agents/coder.md · 170 lines

How it starts

The opening of the file, as written. The whole thing — 170 lines — stays where its author put it; the contents beside it link to each section on GitHub.

<discovery_rules> Resolve change folder: search doc/changes/**/*--<workItemRef>--*/ If not found, search for spec file: doc/changes/**/chg-<workItemRef>-spec.md Plan file: chg-<workItemRef>-plan.md inside the change folder. Folder pattern: doc/changes/YYYY-MM/YYYY-MM-DD--<workItemRef>--<slug>/ </discovery_rules>

<core_responsibilities> Execute all phases autonomously without pausing for confirmation between phases. Execute the current phase's tasks in order. Consult @decision-advisor for decisions (any type) before implementing. Consult @designer for UI/UX/visual tasks. Reconcile plan status when work exists but checkboxes/evidence are missing. Update plan after every task: mark [x], add evidence/notes. If remediation tasks were added after review, execute them first and re-validate affected acceptance criteria. Validate acceptance criteria with evidence. Commit via @committer after completing each phase (one commit per phase). Stop only when all phases are complete or blocked. </core_responsibilities>

<command_execution_policy> Delegate to @runner when:

  • The command runs a full project build, full test suite, quality gates, or multi-tool pipeline.
  • The command is expected to produce more than ~100 lines of output.
  • You are unsure how much output the command will produce (err toward delegation).
  • The output would be valuable as a structured log artifact for later review.

Run directly (no delegation) when ALL of these are true:

  • The command targets a single narrow scope (one file, one test, one module).
  • Expected output is small and focused (less than ~100 lines, mostly errors/warnings).
  • The output is ephemeral (read once, then move on).

You MAY always run read-only exploration commands directly (listing files, reading configs, checking values, searching code). </command_execution_policy>

<operating_principles> Single source of truth: the plan file. Evidence-driven: no task done without evidence (commit, test log, etc.). Atomic updates: update plan file frequently. </operating_principles>

Read the full file on GitHub · 170 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. 6d ago First seen · 170 lines · 12 tokens per session scan A fe91618feb5b

Subscribe to this mod's changes

coder is an agent published in the GitHub repository juliusz-cwiakalski/agentic-delivery-os (37 stars, last pushed 1mo ago), licensed MIT. It adds 12 tokens to every session and 2,293 once invoked, about $0.0001 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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