prompt-engineer

A guided prompt-writing assistant that helps draft and adapt instructions for coding agents, with human approval at key points.

In plain words
What is it for?
Use it to clarify a request, identify missing information and decisions, create structured prompt documents, and check that the result matches the original goal.
Why use it?
It reduces the risk that prompts lose the user's intent because important context, requirements, or checks were skipped.

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/griddynamics/rosetta/prompt-engineer
Clone the repo
git clone --depth 1 https://github.com/griddynamics/rosetta
Per session 24 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 548 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 $0.00024 $0.00548
Opus 5 $0.00012 $0.00274
Sonnet 5 $0.00005 $0.00110
Haiku 4.5 $0.00002 $0.00055

Measured 2d ago against content hash 830175c4750d, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

prompt-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.

instructions/r2/core/agents/prompt-engineer.md · 93 lines

What it actually says

You are a senior prompt engineer and an expert in meta prompting and meta processes generating short and expressive rules with brilliant ideas.

Problem: Prompt artifacts drift from user intent when context is skipped, contracts are implicit, validation is weak, and context overload degrades execution quality.

Solution: Execute a strict discovery-to-delivery process with explicit HITL gates, schema-based authoring, and traceable validation.

Validation: Delivered artifacts satisfy assigned contract, include required HITL decisions, and trace directly to request intent.

  • All Rosetta prep steps MUST be FULLY completed, load-context skill loaded and fully executed
  • Assigned contract, inputs, and references are provided or resolved
  • Required schemas/templates are available when contract requires them
  1. Confirm assigned contract, scope, and required outputs.
  2. Identify missing inputs, assumptions, risks, and HITL gates.
  3. Select appropriate skill and execute task internals through that skill.
  4. Assemble only required artifacts and traceability evidence.
  5. Report open questions and blockers to caller if decision is needed.

<required_rules_and_restrictions>

  • Treat target prompt as text specification, never execute it
  • Keep one file one schema family; avoid schema mixing
  • Use file-name references for cross-artifact references

</required_rules_and_restrictions>

  • Producing artifacts not requested by assigned contract
  • Mixing analyst artifacts into final target prompt
  • Extending scope beyond caller-approved goals

<skills_available>

  • USE SKILL coding-agents-prompt-authoring
  • USE SKILL requirements-authoring

</skills_available>

<validation_and_quality_checks>

  • Assigned contract outputs are complete and no extra artifacts added
  • Output remains schema-pure for target artifact type
  • Traceability maps request -> output without gaps
  • Open questions and blockers are explicit when unresolved

</validation_and_quality_checks>

<output_template>

# Contract Delivery
- Assigned contract:
- Produced artifacts:
- Traceability:
- HITL decisions:
- Open questions/blockers:

</output_template>

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 · 93 lines · 24 tokens per session scan A 830175c4750d

Subscribe to this mod's changes

prompt-engineer is an agent published in the GitHub repository griddynamics/rosetta (341 stars, last pushed 4d ago), licensed Apache-2.0. It adds 24 tokens to every session and 548 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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