Savings
PRECC tracks estimated token savings from every interception. Use precc savings to see how much waste PRECC has prevented.
Quick Summary
$ precc savings
Session Token Savings
=====================
Total estimated savings: <span data-stat="session_tokens_saved">8,741</span> tokens
Breakdown:
Pillar 1 (cd prepends): <span data-stat="session_p1_tokens">3,204</span> tokens (<span data-stat="session_p1_count">6</span> corrections)
Pillar 4 (skill activations): <span data-stat="session_p4_tokens">1,560</span> tokens (<span data-stat="session_p4_count">4</span> activations)
RTK rewrites: <span data-stat="session_rtk_tokens">2,749</span> tokens (<span data-stat="session_rtk_count">11</span> rewrites)
Lean-ctx wraps: <span data-stat="session_lean_tokens">1,228</span> tokens (<span data-stat="session_lean_count">2</span> wraps)
Detailed Breakdown (Pro)
$ precc savings --all
Session Token Savings (Detailed)
================================
Total estimated savings: <span data-stat="session_tokens_saved">8,741</span> tokens
Command-by-command:
# Time Command Saving Source
1 09:12 cargo build 534 tk cd prepend (cargo-wrong-dir)
2 09:14 cargo test 534 tk cd prepend (cargo-wrong-dir)
3 09:15 git status 412 tk cd prepend (git-wrong-dir)
4 09:18 npm install 824 tk cd prepend (npm-wrong-dir)
5 09:22 find . -name "*.rs" 387 tk RTK rewrite (output truncation)
6 09:25 cat src/main.rs 249 tk RTK rewrite (lean-ctx wrap)
7 09:31 cargo clippy 534 tk cd prepend (cargo-wrong-dir)
...
Pillar Breakdown:
Pillar 1 (context resolution): <span data-stat="session_p1_tokens">3,204</span> tokens <span data-stat="session_p1_pct">36.6</span>%
Pillar 2 (GDB debugging): 0 tokens 0.0%
Pillar 3 (mined preventions): 0 tokens 0.0%
Pillar 4 (automation skills): <span data-stat="session_p4_tokens">1,560</span> tokens <span data-stat="session_p4_pct">17.8</span>%
RTK rewrites: <span data-stat="session_rtk_tokens">2,749</span> tokens <span data-stat="session_rtk_pct">31.5</span>%
Lean-ctx wraps: <span data-stat="session_lean_tokens">1,228</span> tokens <span data-stat="session_lean_pct">14.1</span>%
How Savings Are Estimated
Each correction type has an estimated token cost based on what would have happened without PRECC:
| Correction Type | Estimated Saving | Reasoning |
|---|---|---|
| cd prepend | ~500 tokens | Error output + Claude reasoning + retry |
| Skill activation | ~400 tokens | Error output + Claude reasoning + retry |
| RTK rewrite | ~250 tokens | Verbose output that Claude would have to read |
| Lean-ctx wrap | ~600 tokens | Large file contents compressed |
| Mined prevention | ~500 tokens | Known failure pattern avoided |
These are conservative estimates. Actual savings are often higher because Claude’s reasoning about errors can be verbose.
Cumulative Savings
Savings persist across sessions in the PRECC database. Over time, you can track the total impact:
$ precc savings
Session Token Savings
=====================
Total estimated savings: <span data-stat="session_tokens_saved">8,741</span> tokens
Lifetime savings: <span data-stat="total_tokens_saved">142,389</span> tokens across <span data-stat="total_sessions">47</span> sessions