Add social cost proxies to impact tracking hooks

Extend pre-compact-snapshot.sh to extract 5 new per-conversation
metrics from the transcript: automation ratio (deskilling proxy),
model ID (monoculture tracking), test pass/fail counts (code quality
proxy), file churn (edits per unique file), and public push detection
(data pollution risk flag). Update show-impact.sh to display them.

New plan: quantify-social-costs.md — roadmap for moving non-environmental
cost categories from qualitative to proxy-measurable.

Tasks 19-24 done. Task 25 (methodology update) pending.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

impact-toolkit/README.md

@@ -11,6 +11,11 @@ A PreCompact hook that runs before each context compaction, capturing:
 - Energy consumption estimate (Wh)
 - CO2 emissions estimate (grams)
 - Financial cost estimate (USD)
+- Model ID
+- Automation ratio (AI output vs. user input — deskilling proxy)
+- File churn (edits per file — code quality proxy)
+- Test pass/fail counts
+- Public push detection (data pollution risk flag)
 
 Data is logged to a JSONL file for analysis over time.
 
@@ -63,8 +68,10 @@ consider these complementary tools:
 - **[Hugging Face AI Energy Score](https://huggingface.github.io/AIEnergyScore/)** —
   Benchmarks model energy efficiency. Useful for choosing between models.
 
-These tools focus on environmental metrics only. This toolkit and the
-methodology also cover financial, social, epistemic, and political costs.
+These tools focus on environmental metrics only. This toolkit also
+tracks financial cost and proxy metrics for social costs (automation
+ratio, file churn, test outcomes, public push detection). The
+accompanying methodology covers additional dimensions in depth.
 
 ## Limitations