Remove overfit pattern docs and simplify compareScores

Delete all docs/patterns/** files generated by evalbuff — they overfit
to specific commits rather than teaching generalizable principles.
Simplify compareScores now that parallelism is always 5.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: jahooma

AGENTS.md

@@ -43,10 +43,3 @@ Make an efficient learning agent that can do anything.
 - [`docs/agents-and-tools.md`](docs/agents-and-tools.md) — Agent system, shell shims, tool definitions
 - [`docs/patterns/handle-steps-generators.md`](docs/patterns/handle-steps-generators.md) — handleSteps generator patterns and spawn_agents tool calls
 - [docs/evalbuff/interpreting-task-prompts.md](docs/evalbuff/interpreting-task-prompts.md)
-- [docs/patterns/task-completion-validation.md](docs/patterns/task-completion-validation.md)
-- [docs/patterns/terminal-alternate-screen-buffer.md](docs/patterns/terminal-alternate-screen-buffer.md)
-- [docs/patterns/template-literal-escaping.md](docs/patterns/template-literal-escaping.md)
-- [docs/patterns/task-scope-adherence.md](docs/patterns/task-scope-adherence.md)
-- [docs/patterns/task-type-identification.md](docs/patterns/task-type-identification.md)
-- [docs/patterns/implementation-validation.md](docs/patterns/implementation-validation.md)
-- [docs/patterns/existing-implementation-validation.md](docs/patterns/existing-implementation-validation.md)