agent-canvas-environment SKILL.md skillA
agent-canvas-environment from openhands/extensions is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add openhands/extensions/agent-canvas-environment@git:20260627.b0092a3Pins git:20260627.b0092a3 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- openhands/extensions
- Path
skills/agent-canvas-environment/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260627.b0092a3, committed Jun 27, 2026
- First version recorded
- Jun 19, 2026
- Size
- 9,959 bytes
- Repository stars
- 179
- License
- MIT
Work effectively inside a local Agent Canvas environment, including local agent-server auth, frontend/backend port discovery, safe workspace hygiene, and delegating work to a new local conversation through POST /api/conversations.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Agent Canvas Environment
Use this skill when running inside or alongside a local Agent Canvas stack, especially when the user asks to inspect the local backend, create or monitor local conversations, or delegate work to another local conversation.
## Core rules
- Treat the local Agent Canvas backend as an agent-server API, usually `http://localhost:8001`.
- Treat the local UI as a separate frontend, usually `http://localhost:8000`.
- Do not print session API keys. Pass them directly in `X-Session-API-Key`.
- Trust any runtime-services block or explicit user-provided host over default ports.
- Before mutating a repository, check `git status -sb`. If a worktree has unrelated changes, use a separate worktree or clone.
- When delegating, write a self-contained prompt. The new conversation does not inherit the current chat context.
## Find the session key
Use the first available value, without echoing it:
```bash
KEY="${SESSION_API_KEY:-${OH_SESSION_API_KEYS_0:-${LOCAL_BACKEND_API_KEY:-}}}"
if [ -z "$KEY" ] && [ -f "$HOME/.openhands/agent-canvas/api-key.txt" ]; then
KEY="$(tr -d '\n' < "$HOME/.openhands/agent-canvas/api-key.txt")"
fi
…Read the whole file at its exact version.
How to install
mdr add openhands/extensions/agent-canvas-environment@sha256:40562401fb3e07a9The line at the top of this page pins the label git:20260627.b0092a3, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_5r75rqr3asqwpubu)
8 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Jun 19, 2026 and Jun 27, 2026, about one every 8 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260627.b0092a3 latest | 2026-06-27 | b0092a3 | 9,959 B | A | view · diff |
| git:20260619.bb34a76 | 2026-06-19 | bb34a76 | 5,008 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (9959 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
openhands/extensions · 179 stars · license MIT · pushed 2026-11-08 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_5r75rqr3asqwpubu GET https://markdownregistry.com/api/v1/resolve?ref=openhands/extensions/agent-canvas-environment GET https://markdownregistry.com/api/v1/blob/40562401fb3e07a921f4a1451cc44a4ed6441239c18a4f334791fa6a953f103c
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.