{"id":50892963,"url":"https://github.com/mirusser/quack","last_synced_at":"2026-06-15T22:01:48.751Z","repository":{"id":362545894,"uuid":"1259574573","full_name":"mirusser/quack","owner":"mirusser","description":"A tiny semantic protocol for agent coordination.","archived":false,"fork":false,"pushed_at":"2026-06-04T20:39:32.000Z","size":103,"stargazers_count":0,"open_issues_count":0,"forks_count":0,"subscribers_count":0,"default_branch":"master","last_synced_at":"2026-06-04T21:17:35.169Z","etag":null,"topics":["ai-agents","protocol"],"latest_commit_sha":null,"homepage":"","language":"C#","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":null,"status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/mirusser.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":null,"code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null,"zenodo":null,"notice":null,"maintainers":null,"copyright":null,"agents":"AGENTS.md","dco":null,"cla":null}},"created_at":"2026-06-04T16:36:03.000Z","updated_at":"2026-06-04T20:39:44.000Z","dependencies_parsed_at":null,"dependency_job_id":null,"html_url":"https://github.com/mirusser/quack","commit_stats":null,"previous_names":["mirusser/quack"],"tags_count":null,"template":false,"template_full_name":null,"purl":"pkg:github/mirusser/quack","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/mirusser%2Fquack","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/mirusser%2Fquack/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/mirusser%2Fquack/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/mirusser%2Fquack/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/mirusser","download_url":"https://codeload.github.com/mirusser/quack/tar.gz/refs/heads/master","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/mirusser%2Fquack/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":286080680,"owners_count":34381762,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2026-05-26T15:22:16.424Z","status":"online","status_checked_at":"2026-06-15T02:00:07.085Z","response_time":63,"last_error":null,"robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":true,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["ai-agents","protocol"],"created_at":"2026-06-15T22:01:47.953Z","updated_at":"2026-06-15T22:01:48.746Z","avatar_url":"https://github.com/mirusser.png","language":"C#","funding_links":[],"categories":[],"sub_categories":[],"readme":"# 🦆 Quack!\n\n**A tiny semantic protocol for agent coordination.**\n\n\u003e Quack rides inside [A2A](https://google.github.io/A2A/) as an extension.  \n\u003e Quack speaks in typed envelopes.  \n\u003e Quack never mutates without proof.  \n\u003e Quack loudly when something is unsafe.\n\nIf an agent cannot express the next step as a clear quack,\nmaybe it should not do it.\n\nAgents can still use natural language, but every meaningful coordination\nstep must have a tiny typed **Quack** envelope next to it.\n\nThe agent that owns a capability should be the authority on whether that capability is appropriate to use in a given situation.\n\n\u003e **Quack is:**\n\u003e\n\u003e small \u0026nbsp;·\u0026nbsp; injectable \u0026nbsp;·\u0026nbsp; language-agnostic\n\u003e low-level \u0026nbsp;·\u0026nbsp; not married to JSON\n\n## 🪶 Verbs\n\nEleven typed envelopes. Verb reference: [`spec/quack-verbs.md`](spec/quack-verbs.md).\n\n| Verb | Emoji | Kind | What it means |\n|------|-------|------|----------------|\n| `quack` | 🦆 | announce | \"Something happened\" |\n| `peck` | 🐤 | request | \"Please do this\" |\n| `bob` | 🦢 | ack | \"Received / approved\" |\n| `nack` | 🐦‍⬛ | reject | \"Cannot do this\" |\n| `splash` | 💦 | announce | \"Here is the evidence\" |\n| `egg` | 🥚 | request | \"This is the plan\" |\n| `hatch` | 🐣 | request | \"Approve this plan\" |\n| `flap` | 🪽 | request | \"Execute the approved plan\" |\n| `perch` | 🕊️ | announce | \"Finished / landed\" |\n| `honk` | 🪿 | alarm | \"Something is wrong\" |\n| `molt` | 🪹 | alarm | \"Plan no longer valid\" |\n\n## 📦 Encodings\n\nFour encodings, one canonical frame. All round-trip through the abstract\nQuack Frame model.\n\n| Encoding | Role | Priority |\n|----------|------|----------|\n| Quack-Text | Humans, injection, logging | **MUST** |\n| Quack-HTTP | A2A headers, agent cards | SHOULD |\n| Quack-JSON | A2A bodies, tooling | MAY |\n| Quack-CBOR | Machines, compact transport | MAY |\n\nQuack does not require agents to speak JSON.\nIt only asks them to quack clearly.\n\n## 🧩 Where Quack Fits\n\nThe agent protocol stack has a gap at the semantic coordination layer. A2A handles\ndiscovery and transport, MCP handles tool access — but nothing standardizes what agents\nactually *say* to each other. Quack fills that gap.\n\n| Layer | Existing standard | What it does | What's missing |\n|---|---|---|---|\n| Discovery | A2A Agent Cards | \"What agents exist and what can they do?\" | — |\n| Transport | A2A (JSON-RPC, gRPC, HTTP) | \"How do messages flow between agents?\" | — |\n| Task Lifecycle | A2A Task model | \"Is this task pending, running, done?\" | — |\n| **Semantic Coordination** | **Nothing standard** | **\"What does this message mean?\"** | **Quack fills this** |\n| Tool Access | MCP | \"How does an agent call a tool?\" | — |\n| Orchestration | LangGraph, CrewAI, etc. | \"How do I build multi-agent workflows?\" | — |\n\nQuack rides inside A2A as an extension — it adds typed semantic envelopes\n(risk-gated, digest-bound, sequence-validated) on top of A2A's transport layer.\n\n## 🔐 Proof Chain for Mutations\n\n```\n💦 SPLASH  →  🥚 EGG  →  🐣 HATCH  →  🦢 BOB  →  🪽 FLAP\n(evidence)     (plan)     (human review)  (approval)   (execution)\n```\n\nHuman approval is out-of-band: the gateway emits `bob`/`nack` as a relay.\n\nDelivery rules: **risk gating**, **dst/addressing**, **ttl freshness**.\n→ [`spec/quack-0.1.md`](spec/quack-0.1.md)\n\n## 📄 Specs\n\n| Document | What it covers |\n|----------|---------------|\n| [`spec/quack-0.1.md`](spec/quack-0.1.md) | Core protocol — frame model, verbs, encodings, delivery rules, A2A integration |\n| [`spec/quack-verbs.md`](spec/quack-verbs.md) | Quick-reference verb table |\n| [`spec/quack.schema.json`](spec/quack.schema.json) | JSON Schema for all 11 verbs |\n| [`spec/quack-mutation-v0.1.md`](spec/quack-mutation-v0.1.md) | A2A mutation profile — state machine, digest rules, conformance fixtures |\n| [`spec/quack-sdk-0.1.md`](spec/quack-sdk-0.1.md) | .NET SDK — frame model, sinks, validation, DI, error handling |\n| [`spec/quack-sdk-adapters-0.1.md`](spec/quack-sdk-adapters-0.1.md) | .NET SDK — codecs, A2A adapter, ASP.NET middleware, URIs, traces |\n| [`spec/quack-sdk-future-0.1.md`](spec/quack-sdk-future-0.1.md) | Future — CLI, profiles, OTel, MCP, signing, multi-language |\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmirusser%2Fquack","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fmirusser%2Fquack","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmirusser%2Fquack/lists"}