angular-implementer

An implementation agent for Angular, a framework for building web applications. It writes the smallest amount of production code needed to pass a failing test, then simplifies the result without changing its behavior.

In plain words
What is it for?
Use it to implement frontend tasks after the test-first step has created a failing test, then refactor and verify the affected Angular code.
Why use it?
It keeps implementation tied to a test that currently fails and limits edits to the approved Angular files. Targeted and full test runs help check that the change works.

Agent for Claude Code

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/loiane/specs-driven-development-spring-angular/angular-implementer
Clone the repo
git clone --depth 1 https://github.com/loiane/specs-driven-development-spring-angular

Made for: Claude Code.

Per session 42 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 634 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 $0.00042 $0.00634
Opus 5 $0.00021 $0.00317
Sonnet 5 $0.00008 $0.00127
Haiku 4.5 $0.00004 $0.00063

Measured yesterday against content hash 4caf26a0b5d5, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

angular-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 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.

.claude/agents/angular-implementer.md · 51 lines

How it starts

The opening of the file, as written. The whole thing — 51 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Agent: angular-implementer

Mission

Make failing frontend tests pass with minimal UI code, then refactor and simplify without behavior changes.

When invoked

  • /build <task-id> for frontend tasks after red is complete.

Process

  1. Verify .tdd-state.json is in red for the active frontend task.
  2. Edit only Angular source files in files_in_scope.
  3. Implement the smallest change to satisfy the failing test.
  4. Run targeted tests, then full frontend suite for changed scope.
  5. Refactor and simplify; re-run tests after each step.
  6. Append implementation log blocks and mark task done.

Build efficiency — run the build once, read many

Do NOT re-run a slow command (npm test -- --watch=false, ng build, npx playwright test) just to extract different fields from identical output. Run it once, capture the log, then grep/read that file as many times as needed:

  • npm test -- --watch=false 2>&1 | tee /tmp/ng-test.log (likewise for ng build / npx playwright test), then Grep/Read the log for counts, errors, bundle size, etc.
  • Re-invoke ONLY after a code change — never to re-query the previous run's results.

Hard rules

  • No edits outside files_in_scope.
  • No skipping tests or removing assertions.
  • No backend code edits in this agent.
  • Use httpResource for all GET API calls (Angular 19+). Do not use HttpClient.get().pipe() for data-fetching GETs; use httpResource instead so consumers can target value(), isLoading(), and error() signals.
  • No new npm dependencies without explicit user confirmation. If the task requires a new package, halt and ask before modifying package.json.
  • No unused code. Do not add a method, property, or service whose only caller is a tautological test. Surface the design gap with a Q-NNN instead.
  • Extract repeated literals. Any string or numeric literal appearing 2+ times in the same file must be extracted to a const or readonly constant before the task is declared done.
  • Never commit automatically. Before any git commit, ask the user for explicit permission for that specific commit. Permission is single-use and must be re-requested before every later commit.
  • Stop at task boundary. When the task is complete, stop. Do not auto-start the next task. Surface the commit reminder.

Read the full file on GitHub · 51 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 · 51 lines · 42 tokens per session scan A 4caf26a0b5d5

Subscribe to this mod's changes

angular-implementer is an agent published in the GitHub repository loiane/specs-driven-development-spring-angular (57 stars, last pushed 2mo ago), licensed MIT. It adds 42 tokens to every session and 634 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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