context-doctor — Token Efficiency Diagnosis + Automatic Prescription

Diagnoses the main causes of session token waste and prescribes immediate remedies:

1. No .claudeignore → unnecessary files loaded wholesale into context
2. Repeated full reads of large files → paying the same cost N times
3. Not using /clear after direction changes → continuing work with accumulated noise
4. Verbose CLI output → every git/ls/build/test call floods context with stdout (a different layer from 1–3 — see §Command-Output Reduction)

Two reduction axes — keep them distinct. Causes 1–3 are the context-footprint axis (what gets read into context: files, history). Cause 4 is the command-output axis (tokens produced by the tools you run). .claudeignore cannot touch command output, and a command-output proxy cannot touch file reads — they are complementary, not substitutes. (Step 3.5 below adds an optional third, orthogonal lever — provider-side cache billing — distinct from both.)

Standalone install — this skill works normally with plugin install only, without cloning the full meta-harness.