# Roo Foundation

> Use when building an agent harness's safety layer AND context plane: pure approval classification with timeout auto-answer, budget-window spend caps, tool repetition breakers, model-driven persona routing, promise-gated late config, stack-driven request loops, shadow-git checkpoints, non-destructive condense/truncate history management, dual-log persistence with rewind reconciliation, execution-time tool gating, native tool-call stream parsing with fail-fast validation, fuzzy SEARCH/REPLACE diff application, .rooignore access control, mention-to-context pipelines, multi-instance task history stores, budgeted prompt-cache breakpoint placement, bounded ripgrep search transport, tree-sitter definition-outline extraction over a lazy WASM grammar loader, AND a whole-file-mined workspace→Qdrant code-index RAG pipeline (scanner/parser/watcher/orchestrator, 8-embedder batching kernel, pathSegments filter grammar, in-collection indexing markers, dimension-mismatch recreation).

- Skill: `ryan-brosas/roo-foundation` (Agent Skill, multi-file: 105 files)
- Install (CLI): `npx skillmds@latest add ryan-brosas/roo-foundation`
- Raw SKILL.md: https://api.skillmd.com/api/skills/ryan-brosas/roo-foundation/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: DevOps & Infra
- Author: ryan-brosas (https://skillmd.com/u/ryan-brosas)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/ryan-brosas/roo-foundation

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# Roo-Code Foundation

## Foundation contract

This is a cold, source-specific foundation, not an operational procedure. It is
historical, revision-pinned evidence rather than timeless guidance. Current
project source, tests, requirements, and runtime behavior outrank this
projection and decide what ships.

## Provenance and revision

- Source record: `roo`; portable upstream identity, license, coverage caveats, and retrieval history are preserved in the index.
- Recorded revision: `main@b867ec9145750d0ae1ff7f02d35406e9bf2a0b16`.
- Full provenance, coverage caveats, boundaries, and preserved evidence:
  `references/index.md`.

## Topic map

- Representative topics: Safety & approvals; Personas & tools; Loop
  resilience; Context plane (non-destructive history); State & UI; State & UI
  (multi-instance history); Native tool-call streaming & protocol; Config
  plane.
- Scope and retrieval questions: `references/index.md#use-this-for`.
- Complete capsule chooser: `references/index.md#load-the-matching-source-dump`.
- Detailed grouped map: `references/index.md#capsule-map`.
- Source limitations and portability boundaries: `references/index.md#boundaries`.

## Retrieval

Open the index, choose one capsule matching the active question, and load only
that capsule. Revalidate its cited source and revision before relying on it. Do
not bulk-load the inventory, treat historical claims as current truth, or apply
this foundation as a procedure.