Carlos Florêncio
37 lines
2.2 KiB
Markdown
37 lines
2.2 KiB
Markdown
# 0001: File-based knowledge system
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**Status:** accepted
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**Date:** 2026-03-28
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**Area:** infra
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## Context
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Agents working on Kandev had no way to record architectural decisions or store implementation plans for future reference. This led to repeated questions about "why was X done this way?" and lost context when features were revisited. The project needed a knowledge system that works across agent providers (Claude Code, Codex, Copilot) without custom infrastructure.
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## Decision
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Use a three-tier, file-based knowledge system:
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- **Tier 1 (always loaded):** `CLAUDE.md` stays slim and points to Tier 2 indexes.
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- **Tier 2 (index files):** `docs/decisions/INDEX.md` and `docs/plans/INDEX.md` — one-line-per-entry tables that agents read to find relevant items.
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- **Tier 3 (individual files):** Individual ADRs (`docs/decisions/NNNN-*.md`) and plans (`docs/plans/YYYY-MM-*.md`), loaded only when needed.
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Architecture decisions are recorded as ADRs (this file is an example). Implementation plans are committed to `docs/plans/` as permanent records after features are implemented.
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A `/record` skill provides convenience for creating ADRs and plans, but the system works without it — agents can create files directly following the conventions.
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## Consequences
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- Agents can discover past decisions by reading a small index file, then drill into specific ADRs.
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- No file grows unbounded — each decision is its own file.
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- Knowledge is committed to git and survives across sessions, branches, and agent providers.
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- The `/feature` skill integrates with the decision log (reads in Phase 2, writes in Phase 6).
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- Requires discipline to record decisions — this is a convention, not an enforcement mechanism.
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## Alternatives Considered
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- **Database-backed memory (SQLite, vector search):** Too complex, requires infrastructure, doesn't work for agents that only read files.
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- **Append-only daily logs (OpenClaw pattern):** Good for persistent agents but Kandev agents are session-scoped — daily logs would accumulate noise.
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- **Auto-compaction system:** Not needed — the tiered index approach prevents unbounded growth in the first place.
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- **CLAUDE.md inline decisions:** Would make CLAUDE.md grow unbounded and overwhelm agent context.
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