Kestra is an open-source platform for defining and running data, AI, and infrastructure workflows that start on a schedule or in response to events. It is used to automate pipelines and operational processes through a declarative interface and a visual interface. Catalogue add-ons help coding agents work with Kestra workflows.
Borrowing it
Nothing to install: this file belongs to kestra-io/kestra. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/kestra-io/kestra/develop/AGENTS.mdgit clone --depth 1 https://github.com/kestra-io/kestraWrote 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.
[](https://agentmods.dev/instructions/kestra-io/kestra/agents-md)<a href="https://agentmods.dev/instructions/kestra-io/kestra/agents-md"><img src="https://agentmods.dev/badge/instructions/kestra-io/kestra/agents-md/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/instructions/kestra-io/kestra/agents-md"><img src="https://agentmods.dev/badge/instructions/kestra-io/kestra/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.07268 | $0.07268 |
| Opus 5.5 | $0.02907 | $0.02907 |
| Sonnet 5.5 | $0.01454 | $0.01454 |
| Haiku 4.5 | $0.00727 | $0.00727 |
Grade A, and why
kestra AGENTS.md 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 14d 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.
How it starts
The opening of the file, as written. The whole thing — 540 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Coding Agent Guidelines for Kestra Open Source Edition
This document provides essential information for AI coding agents working on the Kestra codebase.
IMPORTANT — READ FIRST
- Act as a Senior Software Engineer and Software Architect. Approach software development with:
- Pragmatism: Favor simple solutions over clever ones
- Skepticism: Question decisions that could cause technical debt or scalability issues
- Efficiency: Only challenge when it genuinely matters
- Think before coding: explicitly state assumptions, compare alternatives, and justify choices.
- Simplicity first (KISS): overengineering and "gas factories" are strictly forbidden.
- Surgical changes only: touch only what is strictly necessary to achieve the goal.
- Goal-driven execution: define what success looks like before writing the first line of code.
- Reuse before writing: the pattern you need almost always exists already. Find the closest equivalent in the codebase and follow it instead of inventing a second way to do the same thing.
- No comments by default: see Comments. Over-commenting is one of the most common reasons a PR written by an agent has to be revised.
- How Kestra looks is decided by the design system: see UI Design System. No color, spacing, radius or component pattern may be invented in feature code.
- A test has to be able to fail for a reason a reviewer would care about: see When a test earns its place. More tests do not make a change safer.
- Build and test only what you touched rather than the whole repo: see What to run after a change.
Comments
The default is no comment. Small methods with accurate names need no explanation, and every comment is a second thing that has to be kept in sync with the code. Over-commenting is easy to slip into: the next line gets narrated, the method name gets restated above the method, and // Step 1 / // Step 2 scaffolding is left behind. None of that will be accepted in review.
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.
- 14d ago Changed · +3 tokens per session 9c40ddefc38c
- 22d ago Changed · +23 tokens per session ddbe5677c7de
- 23d ago Changed · -31 tokens per session 3f2fa12afd90
- 28d ago Changed · +38 tokens per session 960527bd24e1
- 1mo ago Changed · +1 lines · +63 tokens per session 58b4748e53b4
- 1mo ago Changed · +16 lines · +164 tokens per session 2429e447abfa
- 1mo ago Changed · +61 tokens per session 2efef0046201
- 2mo ago First seen · 523 lines · 6,947 tokens per session scan A abc5d003d869
kestra AGENTS.md is an instructions file published in the GitHub repository kestra-io/kestra (30,152 stars, last pushed yesterday), licensed Apache-2.0. It adds 7,268 tokens to every session, about $0.0291 per session on Opus 5.5. 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.
kestra AGENTS.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| kestra AGENTS.mdkestra-io/kestra | Instructions file | 30k | yesterday | Apache-2.0 | A | 7,268 | Codex, OpenCode |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 9,719 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | today | MIT | A | 7,461 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 5,516 | GitHub Copilot |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | today | MIT | A | 4,680 | Codex, OpenCode |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 3,093 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 274k | 2d ago | MIT | A | 4,313 | Codex, OpenCode |