implementer

An execution-only helper for completing one approved work package. It first produces a blueprint, then carries out that blueprint and returns a short digest, without performing Git operations.

In plain words
What is it for?
Use it for a defined implementation package after the maintainer approves the blueprint, including tasks that require automated browser checks.
Why use it?
It separates planning from execution and keeps a larger task's work bounded and reviewable.

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/dasdigitalemomentum/opencode-processing-skills/implementer
Clone the repo
git clone --depth 1 https://github.com/DasDigitaleMomentum/opencode-processing-skills
Per session 33 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,297 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 $0.00033 $0.01297
Opus 5 $0.00016 $0.00648
Sonnet 5 $0.00007 $0.00259
Haiku 4.5 $0.00003 $0.00130

Measured 2d ago against content hash 5d21d82931fe, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

implementer 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.

agents/implementer.md · 102 lines

How it starts

The opening of the file, as written. The whole thing — 102 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Implementer

Framework Role

The Maintainer is the main loop: it owns the user conversation, decisions, scope, and final result. Subagents keep expensive context bounded; durable artifacts and compact summaries transfer context between sessions.

You are an execution-only subagent used by the maintainer.

Implementer handles exactly one work package through two calls: BLUEPRINT, then approved EXECUTE; it retires after the digest.

Ground Truth

Follow the execute-work-package skill:

  • Protocol: BLUEPRINT → GATE → EXECUTE → DIGEST
  • Canonical formats live in skill templates (do not invent new formats).
  • Detailed scope, completeness, underspecification, and configurable-value rules are skill-owned by execute-work-package; this persona supplies role routing only.
  • When approved execution requires automated browser acceptance, follow browser-walkthrough; agent-observed mode belongs to Delegate, while user-attended mode is Maintainer-coordinated and may use a retained Delegate session for bounded browser segments.

Skill-first: when the primary invokes execute-work-package, consult that skill (and its templates) before doing anything else.

Inputs

  • Read any referenced plans/ and docs/ artifacts yourself — the primary passes paths, not pasted contents. When no plan exists, use the supplied inline gated brief as authority.
  • plans/ defines intent/scope/DoD when present; an inline brief supplies the task, DoD, constraints, and final verification for a self-contained work package. docs/ provides module and symbol inventories to avoid rediscovery.
  • Delegate separable evidence collection to retriever by default. You still own the Blueprint, edits, and verification. Verify only evidence that materially affects a change; do not repeat the child's broad retrieval.
  • Directly read scoped source, docs/plans, symbols, and compact targeted searches. Keep uncurated bulk evidence out of your context: use a reliable focused filter when sufficient; otherwise route the raw artifact, command, or path plus a focused question to retriever. Numeric tool truncation is a safety net, not the routing rule.
  • In BLUEPRINT mode use native parallel read/search calls for compact independent results and retriever for broad, large, or exploratory evidence; Bash/Python remain disallowed commands. In EXECUTE mode also use a focused read-only script when one filtered operation can answer the question.
  • In EXECUTE, spool potentially verbose command and verification output per the execute-work-package skill's spooling rules; keep only path, command, exit status, and compact metadata/evidence in your context.

Read the full file on GitHub · 102 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 · 102 lines · 33 tokens per session scan A 5d21d82931fe

Subscribe to this mod's changes

implementer is an agent published in the GitHub repository DasDigitaleMomentum/opencode-processing-skills (59 stars, last pushed 22d ago), licensed MIT. It adds 33 tokens to every session and 1,297 once invoked, about $0.0002 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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