AGENTS.md@pkg/channels/a2aA
AGENTS.md@pkg/channels/a2a from sap/astonish is an AGENTS.md file: the standing instructions coding agents read in that repo.
mdr add sap/astonish/pkg/channels/a2a/AGENTS.md@git:20260814.a3bb48bPins git:20260814.a3bb48b in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 14 of 14 checks passed
- Kind
- AGENTS.md file
- Repository
- sap/astonish
- Path
pkg/channels/a2a/AGENTS.md- Versions recorded
- 1
- Latest version
- git:20260814.a3bb48b, committed Aug 14, 2026
- Size
- 1,818 bytes
- Repository stars
- 25
- License
- Apache-2.0
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
# pkg/channels/a2a — AGENTS.md A2A (Agent-to-Agent) protocol channel adapter. Implements the `channels.Channel` interface to receive tasks from external AI agents via the A2A v1.0 protocol. ## Scope - `a2a.go` — `A2AChannel` struct implementing `Channel` interface. - `handler.go` — Request handling: message normalization, task lifecycle, response delivery. - `session.go` — Session key generation with agent isolation and identity propagation. ## Key Design Decisions ### Multi-Client Architecture Unlike other channels (1 adapter = 1 bot account), the A2A channel handles ALL registered agents through a single adapter instance. Agent identity comes from HTTP authentication (resolved in `pkg/api/a2a_auth.go`), passed into handler methods. ### Identity Propagation External agents can act on behalf of Astonish users. The `pkg/a2a/identity.go` module resolves the effective user from message metadata. The adapter uses `PlatformResolver` with the resolved identity, exactly like Telegram/Slack/Email channels. ### HTTP-Driven (Not Polling) …
Read the whole file at its exact version.
How to install
mdr add sap/astonish/pkg/channels/a2a/AGENTS.md@sha256:0c16c20c004f66f4The line at the top of this page pins the label git:20260814.a3bb48b, 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_k6dp6pspnp26c62m)
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Versions
The registry has recorded 1 version of this file, committed on Aug 14, 2026.
Audit of the latest version
- pass: Size between 200 bytes and 200 KB (1818 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
sap/astonish · 25 stars · license Apache-2.0 · pushed 2026-11-01 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_k6dp6pspnp26c62m GET https://markdownregistry.com/api/v1/resolve?ref=sap/astonish/pkg/channels/a2a/AGENTS.md GET https://markdownregistry.com/api/v1/blob/0c16c20c004f66f46f047e7850559ca29551cfd78f1a6b91b33142542dc1e1d1
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: how to write a good AGENTS.md · AGENTS.md vs CLAUDE.md · which agent file does what.