The mutate seam's root-path ops, its non-array rejection, and the recursion
into an existing nested object were unexercised, as was the whole containment
side of the settings/document-updated fan-out and the before-snapshot repair
of a section a hand edit left non-object. The settings.mutate route had no
round trip at all: neither the client method nor the handler entry ran.
The per-file coverage gate caught three uncovered paths in the error handling
this round added: the page banner for a failed row removal, the editor card's
transport-rejection catch, and `store.fail` itself.
Two of them are one click each — Remove with a rejecting write, Apply with a
rejecting write — so they are covered through the UI rather than by calling
the helpers directly. The third was a duplicated `error instanceof Error ?
error.message : String(error)` in two files; it becomes one exported
`messageOf`, which removes the branch from both call sites and gives the
fallback arm a home a direct unit test can reach (the lint rule forbids
rejecting a promise with a non-Error, so a rejection cannot exercise it).
The review named this call site with the other two, and the previous pass
missed it: the editor card's mount-time `credentials.describe` had only a
fulfillment handler, so a transport failure reached the browser as an
unhandled rejection.
The probe is a placeholder hint ("already configured"), never a precondition
for editing, so it now renders without the hint rather than failing. Covered
by a test that fails without the handler.
The remaining P1 from the #939 review, plus the P2 it shares a mechanism with.
Nothing carried a version, so two tabs editing one namespace silently
overwrote each other — reproduced as tab B's `reasoning` lost to tab A's
older draft. The seam's per-namespace write queue orders writes; it cannot
tell a fresh writer from one replaying a snapshot a predecessor superseded.
Each namespace now carries a monotonic `revision` over its RAW section. A
write may send `expectedRevision`, checked at the FRONT of the queue (not at
call time, which would race the very predecessor it guards against); a
mismatch rejects with `SettingsConflictError` → `settings-conflict` on the
wire, carrying both revisions. The editor captures the revision it opened at
and, on conflict, asks the user to reopen rather than replaying its snapshot.
The same counter fixes the missing broadcast. `settings/updated` is gated on
the resolved value — correct for consumers, wrong for configuration surfaces:
storing an override equal to the composition base leaves the resolved value
alone while changing what the document says (the field is now overridden, not
inherited) and moving every open editor's revision. `settings/document-updated
(ns, revision)` fires on any raw-section change, in-process or external, and
`host/settings-changed` now rides it.
That event also closes the stale model picker: editing a provider's `models`
changes no route, so `llm/adapters-updated` never fired and an open picker
kept serving the old catalog. A change to an exposed provider namespace now
emits `host/models-changed` too — that namespace holds the catalog.
Docs: both sides of the five touched README pairs, a type-equiv block for
`SettingsPathOp`, and an Agent Note recording what the plane exposes and who
may overwrite what. The deferred wire-redaction gaps (secrets behind
union/intersection/transform, `.default(...)` in the served envelope, schema
text in rejection messages, `new Function` rehydration, pi-ai's `headers`) are
recorded as TODO(settings-wire-redaction) and in Known Limitations rather than
half-fixed.
Five findings from the #939 review, each reproduced before being fixed.
**Configuration reads are as privileged as writes.** `settings.describe`
returns every exposed namespace's configuration and `credentials.describe`
reports whether an arbitrary environment-variable name is configured and from
where — reconnaissance no anonymous caller should have. Both join
PRIVILEGED_METHODS, so the whole configuration plane is loopback-only until
real authentication exists; `trustedHosts` was never authentication. The model
catalog stays reachable: it carries no endpoints or key state, and a LAN
client's model picker legitimately needs it. Asserted over a real HTTP server,
because the Host header a browser actually sends is what decides this.
**The proxy serves only namespaces a registered model provider addresses.**
The settings seam is general — any plugin may register one — but the Web
configuration plane is the model-provider surface. Without the gate, every
future `settings.register()` would silently become remotely readable and
writable configuration. An unregistered namespace and an unexposed one answer
identically, so no caller can enumerate the registry one probe at a time.
**Path-addressed writes replace the redacted-document rebuild.** The editor
reads the REDACTED descriptor, so rebuilding a section from it and replacing
wholesale deleted every literal secret the wire never returned — reproduced as
`{baseURL, reasoning}` in, stored `apiKey` gone out. `settings.mutate` applies
set/unset ops to the section as it stands at the front of the seam's write
queue, and the client names only fields it can see, so an unseen secret is
untouched by construction rather than by care.
P2s in the same pass: `llm/adapters-updated` now contains async listener
rejections (an uncontained one escaped as unhandledRejection, contradicting
the documented "observer failures are contained"); llm-deepseek's retry-policy
swap uses the atomic `registration.replace` instead of dispose-then-register,
which published `[]` then `["deepseek-official"]` so an observer saw the
provider disappear and come back; and a transport rejection no longer strands
the page in `loading` or a card in `busy`, with removal failures surfaced on
the page banner instead of swallowed.
- .loadingFloat moved after the .status/.error block (its padding was
losing the same-specificity race) and re-anchored bottom-right: the
truncated/error rows own the bottom left and keep rendering through a
scan, so the pill can never cover them; confirmCreate's relist now
clears the stale failure text like every other scan launch.
- The close edge resets loading, so the slow-scan effect disarms while
hidden and a reopened dialog waits out a fresh silence window
(regression test added).
- The truncated note's survival through a scan is now asserted in the
slow-scan test; the wait-bound test moved to fake timers with the
200ms bound explicit.
- select()'s exemption from the one-frame rule and the constants' local
calibration premise are recorded in JSDoc and the capability-seam
Agent Note; the themed-scrollbars note's rebinding enumeration is
replaced by a pointer to the mechanical gate (it had drifted twice).
Both pairs re-recorded.
The loading pill's layer-2 background made the sheet an
elevated-surface painter, and the ui-theme scrollbar invariant rightly
flagged what was already latent: the dialog's columns scroll on an l2
card while the thumbs rendered in the base-surface pair. Rebind the
indirection on the card rule so it inherits to the scrolling columns.
Navigations keep the previous view rendering while scanning: target and
parent legs land as one two-pane frame when the parent leg settles within
a 200ms wait bound (past it the target lands alone and the late leg
upgrades in place; Escape inside the landing window withdraws the
navigation). The loading indicator floats over the content on the card
background and appears only once a scan outlives a 300ms silence window,
so navigation never shifts the columns or flashes an intermediate frame.
The truncated note now describes the on-screen panes instead of hiding
during scans.
The `readDenyPaths` policy field shipped in the previous commit broke Linux
confinement outright. bwrap has to create the `/dev/null` bind's mount point
inside a tree its own profile has already made read-only, so it refused the
entire confinement whenever the parent directory was absent — every host that
has not stored a credential yet, including a fresh install:
bwrap: Can't mkdir parents for /home/runner/.dsh/.env: Read-only file system
which the executor correctly classifies as SANDBOX_UNAVAILABLE, so every
confined bash call failed closed. Landlock cannot subtract from its own `/`
read grant, so it reported `partial` enforcement on every confined call for a
file it never hid, with no way to switch the denial off (schemastery fills an
omitted array with `[]`, so empty and omitted were indistinguishable).
A protection that breaks confinement where it works and misreports it where it
does not is worse than a documented absence. Revert the field, both expressible
backends, the enforcement downgrade, and the policy default; state the residue
plainly in the credentials-local READMEs — file mode stops other OS users, not
the model — and keep the OS-keychain provider recorded as the real answer.
The narrower discipline stands: no surface hoists the credential document into
`process.env`, and the model is never handed a resolved path to it.
The effort field's existence check was unreachable — EFFORT_FIELD is
total over the two known families — and a coverage exemption was papering
over the branch, which the merged toolchain no longer honored. Taking the
narrowed family as a parameter makes the lookup total at the type level,
so the check and its exemption both disappear. The rendered output is
unchanged: the browser goldens replay byte-identical.
