Tune Voice — Per-Project Voice Extraction & Enforcement

Give a project a durable, reusable writing voice. The voice is a project artifact — it lives at <project>/ref/tone-guide.md, not in global memory — so each project keeps its own voice and drafts can be checked against it.

Fork-and-adapt lineage (design borrowed, storage owned): 9-dimension profile + anti-performative guardrails from entpnomad/tone-of-voice; voice-constant / tone-flex + validate-and-explain from brand-voice-enforcement; extract-from-samples from affaan-m/brand-voice.

Model: voice is constant, tone flexes

• Voice constant — identity, beliefs, audience, traits, terminology, banned phrases. Never changes across a project's copy.
• Tone flexes on three axes — formality · energy · technical depth — per channel (slide vs. Slack recap vs. cold email vs. golden-source doc).

A profile captures both. Enforcement holds the constant and picks the tone-flex for the channel at hand.

Step 0: Resolve the profile path

1. Read $PRAXIS_DIR/config/projects.yaml. Match --project <alias> against project keys (case-insensitive); if a name is given instead, fuzzy-match name fields. If no --project, infer from the working directory (which project's praxis: path is an ancestor of cwd), else ask.
2. Profile path = <project praxis root>/ref/tone-guide.md, where the praxis root is the praxis: value for that alias (resolve /praxis/..., /repos/... aliases via .claude/paths.md).
3. Leaf projects (a praxis: path with sub-projects, e.g. Slasheo's guide lives under ai-school-tech/ref/): accept an explicit --path <dir> override, or Glob for an existing **/ref/tone-guide.md under the project root and reuse it.
4. Guards: if $PRAXIS_DIR unset → ⚠️ $PRAXIS_DIR not set. export PRAXIS_DIR="$HOME/dev/praxis". If config missing → ⚠️ No project config at $PRAXIS_DIR/config/projects.yaml.