Turns the design doc into an ordered, dependency-correct build plan (phases 0-9) with an exit criterion per phase, and records the twelve architectural decisions it rests on as ADRs. Decisions: single Rust binary with routed compose services; Streamable HTTP only; per-agent bearer tokens with clientInfo as a display hint only; SQLite; get_rules delivered via session gating; full-document rule delivery; project_id from day one; enforcement tier scoped to Bridle-mediated actions; stable tool list on upstream failure; OpenAI-compatible embeddings with model/dim guarding; pattern RAG gated behind a spike; CLAUDE.md + AGENTS.md as v1 renderer targets. Deviates from the design doc's original 1-8 ordering by moving the audit log and multi-project schema into phase 1, building the admin API incrementally rather than all at the Web Panel phase, downgrading vendor guardrail sourcing to manual-first, and gating the pattern-example RAG behind a validation spike. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_019RZerbsHGF9Ka3bKhCjJ9m
33 lines
1.5 KiB
Markdown
33 lines
1.5 KiB
Markdown
# ADR-0001: Single Rust binary with routed compose services
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**Status:** Accepted (2026-08-08)
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## Context
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The design doc's architecture diagram shows Rules, Memory, the Kanboard wrapper, and the Web Panel
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as separate boxes, which reads as four independent deployables communicating over HTTP. Bridle
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targets single-host, single-user deployment. Splitting hand-written components across processes at
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that scale buys nothing: it costs four ports, four health checks, four failure modes, and turns
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what would be function calls into network hops.
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## Decision
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All hand-written components compile into **one Rust binary** with internal modules: `mcp` (server
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and session handling), `rules`, `memory`, `proxy`, `admin`, and the Web Panel's served assets.
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Module boundaries stay clean enough that any module could be split into its own service later
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without redesign.
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Third-party and off-the-shelf services remain **separate Docker Compose containers** — Qdrant,
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Kanboard, the embedding server, and the existing Gitea MCP server — with all agent traffic to them
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routed through the binary.
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## Consequences
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- One deployable, one health check, one log stream, one thing to restart.
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- No Python sidecar: the memory module is Rust talking to Qdrant and to an OpenAI-compatible
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embeddings endpoint over HTTP.
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- Compose profiles for bundled-versus-external services are unaffected — see the deployment section
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of the design doc.
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- If Bridle ever outgrows single-host, the module boundaries are the seams to split along. This is
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a deliberate deferral, not an oversight.
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