Record dest on occupy and retract it when confirmation, verify, or
staging cleanup fails. Restore unmatched quarantine with a no-replace
publish. Event/devapp copy uses mkdir-claim; shell rollback claims dest
before delete. Release copy now says npm/PowerShell create junctions and
Go uses os.Symlink, with copy fallback when linking is unavailable.
The RFC section on filesystems that reject the atomic no-replace rename
still described the retired existence-check-plus-plain-rename fallback
and its accepted race window. The implementation (and the npm and shell
surfaces) claim the destination with mkdir or a hard link — or create
the link directly at the destination — and never release the claim mid
transaction, so a concurrently created object is refused rather than
overwritten. Record that contract and its only relaxed property (child
moves are not all-or-nothing visible) so future maintainers do not
port the racy description back into code.
A universal Agent whose obsolete private copy cannot be retired installs
nothing there, yet every entry point counted that retirement failure as an
install failure — aborting `npm install`, `dws skill setup`, and the shell
installers even when the canonical store and all links published correctly,
and skipping the skills-state write. Route retirement failures to a separate
warning path across all surfaces (Go upgrade + skill setup, npm, PowerShell,
install.sh, install-skills.sh, install-event.sh, install-devapp.sh).
Also:
- Add a checked-rename fallback for filesystems that reject the atomic
no-replace flag (NFS, FUSE, overlayfs); the no-clobber contract is kept and
the previously unsupported platforms build and work.
- PowerShell multi-mode links only bundle skills, never the shared canonical
store, so third-party/user skills are no longer fanned into every Agent root.
- Prune ~/.dws/skill-backups to the newest 5 on every surface; encode
HOME-relative backup names on PowerShell to preserve origin.
- Add simulated-win32 junction coverage and rewrite the tautological
no-replace test; remove dead code whose tests gave false coverage.
- Soften the overstated Windows ownership-proof comment (NTFS tunneling).
Fifth-review addition: declaring InputFile silently claims the whole
@-prefixed value space, which matters in this product because at-mention
style values are common (--at-user @zhangsan would report a file read
failure), and declaring InputStdin makes a literal "-" unreachable. Both
are decided at declaration time and cannot be fixed downstream, so record
them next to the confirmation rule in the author rules.
Fourth-review fix: the FlagSpec sub-field table in the homology doc is
the named authority for "what each field does and whether it reaches
Schema parameters", and RFC §5.0.2 asserts declaration fields embed into
dws.schema.*. Input satisfied neither entry, leaving its deliberate
non-projection indistinguishable from an oversight. Add the table row and
the §5.0.2 exception note so the capability stays a declared fact (Usage
prose) rather than inviting an invented annotation.
Document the landed corecmd.Input transitional form: declaration shape
(FlagSpec/LeafFlag/shortcut.Flag), runtime resolution semantics and
ordering, author rules (help prose, confirmation interaction with
stdin, construction-time validation), and the delta table against the
target typed InputSource design.
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