docs: adopt per-round files + LLM counterparts; add llm versions for 00-bootstrap and 01-codexhelper; update AGENTS and SeedPrompt

collab/proposals/01-codexhelper.llm.md

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+# 01 — CodexHelper — Proposal (LLM)
+
+- Tool: `CodexHelper` bash wrapper for codex-cli.
+- CLI (subcommands):
+  - new-project: scaffold project files
+  - run: compose prompts + call codex
+  - new-mode: scaffold mode (repo-only)
+- Where to run: repo → only new-mode; elsewhere → new-project, run.
+- Prompts order: global system → mode system overlay (optional) → mode rules → project narrative.
+- Config: YAML + yq; precedence CLI > env > project > mode > global.
+- Binary: detect `codex` then `codex-cli`; override `CODEX_BIN`.
+- Safety: no overwrites without `--force`; never `git push` for user projects.
+- Outputs: `<project>/runs/<ts>/...`.
+- Layout (repo): `CodexHelper`, `bin/install.sh`, `prompts/global/system.md`, `modes/<Name>/{mode.md,system.md?,defaults.yaml}`, `templates/project/<Name>/...`.
+- Layout (project): `prompts/{project.md,style.md?}`, `prompts/_mode/`, `codex.yaml`, `codex.sh`, `runs/`.
+- Phase 1 acceptance:
+  - new-mode creates mode skeleton
+  - new-project scaffolds without overwrites
+  - run composes and calls detected codex; writes under runs/
+  - precedence respected; running in repo errors for run/new-project