Make one seed the standard everywhere; extra seeds optional

[conorplunkett]

Reframes all seed language so a single seed is the standard/required setting and additional seeds are an explicit opt-in. The runner defaults were already [1] (since 2026-08-11) — this is wording only, no behaviour change.

What changed

File	Change
app/cli.py	--seeds help on both eval and phase2-eval → "one seed is standard; pass e.g. 1,2,3 to add optional extra seeds"
README.md	"Three-seed grids…" → single-seed default; extra seeds optional
EPISODE_WALKTHROUGH.md	seed table row → "to add optional extra seeds"
COLAB_GUIDE.md	"full paid design (… three seeds …)" → "full paid grid (… optional extra seeds …)"
web/components/Method.tsx	dropped the "multiple seeds per scenario" claim
static/lab.html + static/lab.js	Lab ladder rung renamed; foot text headlines the one-seed run and calls extra seeds optional
CHANGELOG.md	new entry

Not touched

• paybench_proposal.tex and old CHANGELOG.md entries (historical records).
• Code comments that already frame extra seeds as opt-in.

Checks

• 149 offline tests pass (test_cli.py, test_phase1_runner.py, test_phase2_runner.py).
• CLI --help renders the new text.

🤖 Generated with Claude Code

https://claude.ai/code/session_01F8EYHsahca1iqVz1ABvgAn

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Generated by Claude Code

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Project	Deployment	Actions	Updated (UTC)
unsafe-commercial-autonomy	Canceled		Aug 27, 2026 2:16am