FPF Agent Stack

# 01 Functional Description (FPF Agent Stack) Objective: a local-first agent runtime where “tools” are Agent Skills (on disk) and skills are loaded using the FPF 4-module separation (Kernel/Boundary/Governance/Lifecycle). ## System behavior (black box) Input: user request + available skills registry. Output: selected skill(s) + validated plan + execution trace (future), with strict tool allow-listing. ## Primary contract A skill directory contains `SKILL.md` with: - YAML frontmatter (Boundary + Governance) - Markdown body (Kernel) The runtime must split these parts losslessly and expose: - `boundary.name` - `kernel` text - `allowed_tools` (default empty) ## First acceptance (BDD) Load `skills/hello-world/SKILL.md` for `fpf-skill:hello-world` and assert: - Boundary.name equals the requested id - Kernel contains sentinel phrase - Allowed tools list is empty