# Data-Path Convention

How command, agent, skill, and hook-prompt prose should refer to **user data** vs
**plugin-shipped assets** after the M0 migration. One token, resolved inline, so
the prose Claude reads is directly actionable — no indirection, no stale in-plugin
paths.

## The two roots

| Root | Token in prose | Holds | Moves on migration? |
|------|----------------|-------|---------------------|
| **Data root** | `${LINKEDIN_STUDIO_DATA:-$HOME/.claude/linkedin-studio}` | the user's real data (voice profile, analytics, drafts, plans, …) | yes — auto-migrated out of the plugin on session-start |
| **Plugin root** | `${CLAUDE_PLUGIN_ROOT}` | read-only ships (templates, checklists, references, fonts, framework scaffolds) | no — these stay in the plugin |

The data root **mirrors** the state file (`~/.claude/linkedin-studio.local.md`). The
default is overridable by the single env var `LINKEDIN_STUDIO_DATA`; the deprecated
aliases `ANALYTICS_ROOT` / `STATE_FILE` / `PLUGIN_ROOT` are honored for one minor
version. This generalizes the proven newsletter pattern
`${LTL_SERIES_ROOT:-$HOME/linkedin-series}` (`commands/newsletter.md`) to all data.

## Data-root layout (mirrors brief §7.1)

```
${LINKEDIN_STUDIO_DATA:-$HOME/.claude/linkedin-studio}/
  voice-samples/        authentic-voice-samples.md   chronicle-voice-drift-log.md
  analytics/            exports/ posts/ weekly-reports/ monthly-reports/ ab-tests/
  drafts/               queue.json  week-*/  carousel/  multiplatform/  repurposed/
  profile/              user-profile.md
  frameworks/           <slug>.md
  audience-insights/    demographics.md  engagement-patterns.md
  examples/             high-engagement-posts.md
  templates/            my-post-templates.md
  plans/                <weekly|monthly>-plan-*.md
```

## The prose rule

1. **A path to user data → the data-root token.** Write the full inline form
   `${LINKEDIN_STUDIO_DATA:-$HOME/.claude/linkedin-studio}/<subpath>` — never a bare
   `assets/<x>/` and never `${CLAUDE_PLUGIN_ROOT}/assets/<x>/` for data. The inline
   `:-default` expansion means the prose is self-resolving; do **not** write "the data
   dir's `<x>`" and force a lookup into this doc.
2. **A path to a plugin-shipped read-only asset → keep `${CLAUDE_PLUGIN_ROOT}`.**
   Templates (`config/*.template.*`), checklists, `references/`, fonts, and framework
   scaffolds ship with the plugin and stay there.
3. **Preserve existing graceful-degradation guards.** "if it exists", placeholder /
   sentinel checks, and `<5`-sample silent-skips stay as written — only the path token
   changes.

## Scaffold fallback (the COPY classes + the voice placeholder)

Four data files ship a **seed/scaffold in-plugin** and a **canonical instance external**:
`examples/high-engagement-posts.md`, `audience-insights/{demographics,engagement-patterns}.md`,
`templates/my-post-templates.md`. The voice profile is similar — the plugin ships a
placeholder at `assets/voice-samples/authentic-voice-samples.md`; the user's real profile
lives external. **Readers prefer the external instance and fall back to the in-plugin seed
when external is absent** (the code does this in `personalization-score.mjs`; prose keeps
its "if it exists" guard). The external instance is canonical — migration never clobbers it.

## Why inline, not indirection (the Step-14 GATE finding)

The prototype on the voice-readers family (19 files, 38 refs) measured the open question
from brief D3: *can a convention reduce edits, or do commands need literal paths for Claude
to act on?* Outcome: command prose that tells Claude to **read** a file needs a resolvable
path on the line. A "the data dir's `voice-samples/` (see this doc)" reference adds a lookup
hop and is not directly actionable. The inline `${LINKEDIN_STUDIO_DATA:-…}/…` token is both
self-resolving **and** points here. So the convention does **not** cut the edit count below
~1 per reference — it makes every edit a **uniform, mechanical** token swap instead of a
bespoke per-line decision, with this doc as the single source of truth. Step 15 applies the
same uniform token to the remaining families (D3 realized as one token — not a re-decision).
