Reference for multi-agent LLM topologies: patterns, aliases, sources, starters; one gated report.
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First seen 2 Oct 2026. One server, whatever directories list it: each directory listing keeps its own page and history.
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Tools
| Tool | Description | Behaviour |
|---|---|---|
| fetch | Returns the Markdown document of any public page, exactly as HTTP serves it, from a root-relative path (/patterns/supervisor.md) or a https://topologyindex.com URL. Private tenant routes are not reachable here. A pattern, starter or formation read may add a second item containing a one-time use ticket and an instruction to call `report_outcome` after applying it; pattern and starter redemptions can return indexed pitfalls, checks or a pairing suggestion. | Read-only |
| get_pattern | One pattern page (/patterns/{pattern}.md): definition, aliases, when it is hypothesised to fit, failure modes, sources and whether this deployment can execute it. Accepts a pattern identifier or a known alias. Adds a second item with a one-time use ticket and a one-line instruction when this selected read is eligible; `report_outcome` returns useful indexed follow-up after redemption. | Read-only |
| list_patterns | The decision guide: where to start by the shape of the task, the pattern to consider next and when to avoid each, plus the pattern families (the `choosing` rows of /patterns/index.md, without the rest of that page). With a family, /patterns/index.md?family={family}: that family’s patterns and the rows that name them. With a domain, /domains/{domain}.md: the task shapes common in that kind of work, their rows, the sources of the published findings tagged with it (never a ranking; each finding in words at /domains/{domain}/findings.md) and its starters. The response includes exact next calls for the listed patterns and starters. | Read-only |
| list_starters | The starter formation index (/starters/index.md): unvalidated, unsigned FORMATION.md documents to copy and register privately. With a task class, only the starters that declare it (/starters/index.md?task_class={task_class}). The response includes exact fetch calls for the starter paths. | Read-only |
| report_outcome | Limited rollout: only for a use ticket from a pattern, starter or formation read. If you have no ticket, do not call it. With one, report once after your task: `worked`, `partly` or `did_not_work`, with an optional short note. The response returns a useful follow-up from indexed content when one exists. No prompt, code or log is stored. Terms: /docs/api/contributing.md. | Changes data |
| search | Keyword search, with common synonyms, over pattern names, aliases and families, the decision guide, the domains, sources and benchmarks of published findings, research, starters and guides. At most 10 results, each a path for `fetch`; canonical pattern results also include the identifier for `get_pattern` and an exact next call. If no page matches every word, pages matching some; if none, the decision guide. Matches text only; never ranks patterns. | Read-only |
| Directory | Listing | Tier | First seen |
|---|---|---|---|
| Official MCP Registry | Topology Index | - | 2 Oct 2026 |