pt_commit

.opencode customizes edit, write, pt_rm, etc to autotrack which files the opencode session modifies using tmp/filelocks/ w openCodeSessionId

• agent doesn't have to remember which files it modified
• no git add . (which'd accideintally commit another session's work)
• lockfiles double as a mutex — if two agents try to edit the same file, the second gets blocked w an error. locks autorelease on pt_commit or after 5min

pt_commit also:

• tsc + acorn on changed files, blocks on new violations (ignores pre-existing by diffing against HEAD)
• import boundary enforcement (sharedF can't import serverF, etc)
• embeds openCodeSessionId: ses_xxx in commit for pt_seance etc