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# Obsidian Project Knowledge Base Schema
## Repository-local memory files
- `.claude/project-memory/registry.yaml` — registry keyed by `project_id`
- `.claude/project-memory/<project_id>.md` — compact project memory snapshot used on project turns
Note: `registry.yaml` is currently JSON-formatted on disk for historical compatibility.
Optional per-project registry fields:
- `note_language` — note language for generated/synced notes. Supported values: `en`, `zh-CN`.
Language resolution priority:
1. project config in `.claude/project-memory/registry.yaml`
2. environment variable `OBSIDIAN_NOTE_LANGUAGE`
3. default `en`
## Vault layout
```text
Research/{project-slug}/
00-Hub.md
01-Plan.md
Knowledge/
Papers/
Experiments/
Results/
Reports/
Writing/
Daily/
Archive/
```
## Role of each top-level location
- `00-Hub.md` — project homepage, current state, must-remember numbers, key links
- `01-Plan.md` — active goals, tasks, open questions, next actions
- `Knowledge/` — stable project understanding such as background, research questions, method survey, data protocol, source inventory
- `Papers/` — paper notes, literature summaries, related-work assets
- `Experiments/` — experiment designs, runbooks, ablations, mechanism studies
- `Results/` — canonical durable findings, diagnostics, figure/table indexes, cross-experiment conclusions
- `Results/Reports/` — internal experiment round reports and batch retrospectives with stable naming
- `Writing/` — paper drafting, slides, proposal text, rebuttal material
- `Daily/` — daily logs, lightweight sync queue, scratch notes, meeting fragments
- `Archive/` — inactive or historical material that should not stay in the main working surface
## Minimum note types
- `project`
- `daily`
- `paper`
- `experiment`
- `result`
- `results-report`
- `synthesis`
- `meta`
- `writing`
- `task`
## Main design rule
This schema is intentionally small. Prefer a few durable notes over many placeholder notes.
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