build-si-agent SKILL.md skillB
build-si-agent from adcontextprotocol/adcp-client is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add adcontextprotocol/adcp-client/build-si-agent@git:20260527.2764c56Pins git:20260527.2764c56 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- B, 16 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- adcontextprotocol/adcp-client
- Path
skills/build-si-agent/SKILL.md- Versions recorded
- 5
- Latest version
- git:20260527.2764c56, committed May 27, 2026
- First version recorded
- Apr 30, 2026
- Size
- 6,824 bytes
- Repository stars
- 18
- License
- Apache-2.0
Use when building an AdCP sponsored intelligence agent — a brand-side conversational AI experience that an LLM host (ChatGPT, Claude, Perplexity, Arc) can hand off to.
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
# Build a Sponsored Intelligence Agent A sponsored intelligence (SI) agent runs a brand-side conversational AI experience that an LLM host can hand off to. The buyer agent calls four tools across the session lifecycle: 1. `si_get_offering` — discover what's available, get an `offering_token` 2. `si_initiate_session` — start a conversation, receive `session_id` 3. `si_send_message` — exchange turns, optionally surface a handoff hint 4. `si_terminate_session` — end the session, optionally return ACP checkout payload The agent owns the brand voice, transcript state, and product knowledge. The host owns the user, identity consent, and ACP checkout. SI is the AdCP surface that connects them. ## Pick your fork target | Protocol | Fork this | Storyboard | | --- | --- | --- | | `sponsored-intelligence` | [`hello_si_adapter_brand.ts`](../../examples/hello_si_adapter_brand.ts) | `si_baseline` | …
Read the whole file at its exact version.
How to install
mdr add adcontextprotocol/adcp-client/build-si-agent@sha256:f48092802bbedb26The line at the top of this page pins the label git:20260527.2764c56, 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_tlt5cgfqqep72aaq)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Apr 30, 2026 and May 27, 2026, about one every 7 days. Its first recorded version is graded A and its latest B.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260527.2764c56 latest | 2026-05-27 | 2764c56 | 6,824 B | B | view · diff |
| git:20260503.5118d4a | 2026-05-03 | 5118d4a | 6,680 B | B | view · diff |
| git:20260503.91c1ff8 | 2026-05-03 | 91c1ff8 | 6,129 B | B | view · diff |
| git:20260503.b0e3c00 | 2026-05-03 | b0e3c00 | 28,267 B | A | view · diff |
| git:20260430.6066a7a | 2026-04-30 | 6066a7a | 20,837 B | A | view |
Audit of the latest version
- fail: No link to a raw IP address (matched: http://127.0.0.1:3007)
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (6824 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 script tag
Starting a new one? Use a template for SKILL.md on mdpantry, which passes every one of these checks and says what to change in it.
Source
adcontextprotocol/adcp-client · 18 stars · license Apache-2.0 · pushed 2026-11-05 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_tlt5cgfqqep72aaq GET https://markdownregistry.com/api/v1/resolve?ref=adcontextprotocol/adcp-client/build-si-agent GET https://markdownregistry.com/api/v1/blob/f48092802bbedb26eb26ba2b85fa9f6d2469c46e93aec340a65d94555da80d7f
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.