[michielbdejong]

Closes #1711

Design: docs/design/server-plugin-routes.md (ontola/atomic-plugins#108), sections 0.2, 0.3 and 0.5, and decision D12.

Build gate

• New plugin-routes = ["wasm-plugins"] feature. It is not in default, light or any release set. Behind it for now: only plugin_routes::COMPILED.
• plugin_routes::tests::release_feature_sets_exclude_plugin_routes parses server/Cargo.toml and follows feature dependencies transitively for default, light, light,wasm-plugins, https,wasm-plugins and atomic.place's https,telemetry,img,wasm-plugins. It fails if any of them turns plugin-routes on. I checked it fails when img is made to include the feature.

Runtime gate

Every build has these options, so an env var is never silently ignored:

Flag	Env	Default
--plugin-routes off|read-only|read-write	ATOMIC_PLUGIN_ROUTES	off
--routes-origin	ATOMIC_ROUTES_ORIGIN	unset
--plugin-listeners name:port,...	ATOMIC_PLUGIN_LISTENERS	unset
--plugin-sidecars name=http://127.0.0.1:port,...	ATOMIC_PLUGIN_SIDECARS	unset

Startup rules, checked in build_config before anything binds:

• Any of the options set on a build without the feature: the server refuses to start with the message from section 0.3, which names the option and --features plugin-routes.
• Listeners or sidecars below read-write: the server refuses to start.
• Routes origin: validated like ATOMIC_WEBSITE_ORIGIN. That validation now lives in a shared helpers::separate_origin, and website.rs uses it too. The routes origin also may not overlap the website origin.
• Gate open without a routes origin: the server logs once, and prints in the startup banner, that only the drive-prefix mount is available.

For the next issues: Config::plugin_routes_level() returns the effective level (off unless compiled and switched on), and PluginRoutesConfig::allows(needed) answers whether a surface may be active.

Catalog

GET /plugin-catalog now answers { "entries": [...], "hostFeatures": { "pluginRoutes": { compiled, level, routesOrigin, listeners, sidecars } } }. It reports listener and sidecar names only, never ports or URLs. IntegrationStore.tsx reads both this shape and the old bare array. Nothing new is shown in the UI, so there are no screenshots.

CI (.dagger/src/index.ts)

• rustClippy runs a second clippy pass on -p atomic-server with light,wasm-plugins,plugin-routes.
• rustTest runs cargo nextest run -p atomic-server --lib with the same features.
• Not done yet: the e2e image variant with the feature. Nothing is served behind the feature until Plugin route registry, mounts and reserved paths #1714, so for now it would re-run the whole Playwright suite on an identical server. It should come with the first route-serving issue.

Tests

• cargo test -p atomic-server --lib, with and without --features plugin-routes: 283 passed each time.
• Clippy with --all-targets, in both builds: clean.
• cargo test -p atomic-server --test it server_cli, in both builds:
  • without the feature, ATOMIC_PLUGIN_ROUTES=read-only atomic-server show-config exits non-zero with the 0.3 message;
  • with the feature, the same command reports ReadOnly, and adding ATOMIC_PLUGIN_LISTENERS=x:4455 at read-only exits non-zero.
• The env-var parsing tests run in child processes, so they never change the env of other tests running in parallel.

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[michielbdejong]

Merge-risk triage (2026-09-28). This is a read-only review of this PR's own diff. The rule it applies: nothing that works today may break for existing users or clients, and new behaviour is added alongside the old. The stack is being rebased onto develop as one chain before merging, so line references are against the current stacked base.

Verdict: SAFE (with the planned /plugin-catalog compatibility fix)

The plugin-routes Cargo feature is off in default/light (a test enforces it), and --plugin-routes defaults to off. The website.rs refactor into helpers::separate_origin keeps the same checks. The rebase keeps /plugin-catalog's response shape compatible for older clients and atomic-saas.

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[joepio]

@michielbdejong Trekmeester question about the plugin stack (#1702–#1934, ~42 PRs on feat/plugin-debug / claude/atomic-signature-v2): its root PR #1549 is closed (plugins moved to atomic-plugins), and the stack is 139 commits behind develop. Is this series superseded by atomic-plugins?

• If yes, I'll close all of them (the branches stay).
• If no, please consolidate it into one PR rebased on develop. It contains signatures, crypto and grants, so it needs review from Joep, Polle and you before it merges. I won't merge it piece by piece.

Joep agreed to this approach.

[michielbdejong]

@joepio Thanks for the question, and sorry for the slow answer. Not fully superseded:

• We'll consolidate the parts atomic-plugins needs now into one PR rebased on develop, for review by Joep, Polle and Michiel as you proposed. These are roughly the app-frame APIs, installation proxy signing, the row grant and afterCommit with the change list; the exact list follows.
• Everything else in Host-signed integration-proxy calls for installations, with a loopback exception for exactly the proxy (#1700) #1702–afterCommit follow-ups: end on uninstall, revoke or lost read; drop stale proposals #1934 can be closed (branches kept). When the consolidated PR is up, we'll post the exact list of PRs it replaces and the ones to close.

No need to merge or review anything piece by piece in the meantime.

Posted by Claude (VPS coordinator) on Michiel's behalf, per his decision Q-101.

[michielbdejong]

@joepio Follow-up with the inventory, and a correction: my earlier comment named installation proxy signing and afterCommit/change list as needed. They aren't; the evidence below puts them in the close list.

Can be closed now (35, branches kept):

• Proxy signing and identity for sandbox Installations: Host-signed integration-proxy calls for installations, with a loopback exception for exactly the proxy (#1700) #1702 Installation app ids, published node agents and delegated connections for the integration proxy (#1700, answers 1-3) #1710 atomic-proxy: URLs for plugins, resolved to the delegated connection on the configured proxy (#1700, answer 4) #1725 Page: register Installation runtimes with the proxy, and name the Installation's app id (#1700) #1729 Let the configured integration proxy live on a private network #1731 Installation page: connect proxy platforms, and no proxy calls without one (#1700) #1733 Refuse wasip2 class extenders at the integration proxy, and say why (#1700, piece 5) #1831 Require v2 signatures on state-changing endpoints, each proof once (#1700, piece 7) #1832 Fail closed on installation identities too; merges #1644 (#1700, piece 8) #1833 Connection requests on Installations; pause runs that need one (#1700) #1836. No atomic-plugins app uses this path; drive apps use the frame capability already on develop (Plugin frames: integration-proxy capabilities instead of the relay (ontola/atomic-plugins#54) #1697).
• afterCommit and the change list: Per-table change list with tombstones (#1850) #1885 Durable afterCommit for user-installed plugins, behind --plugin-after-commit (#1851) #1906 afterCommit follow-ups: end on uninstall, revoke or lost read; drop stale proposals #1934. Nothing calls them yet.
• Server-plugin routes, well-known, crypto, queue, gates and manifest v3: Gate plugin public surfaces at build time and at runtime (AS-01) #1726 Plugin manifest v3: http block, derived requires, gate-aware install refusal #1732 Catalog and install review for gated plugins and public endpoints (AS-03) #1742 Plugin route registry, mounts and reserved paths (#1714) #1749 Run plugin routes: the http trigger and route execution (AS-05) #1751 Well-known dispatcher and the drive-host mount (#1716) #1752 Route writes: the route grant, quotas and provenance (#1717) #1754 Answer 404 for an unclaimed /.well-known/ name, not the app's HTML #1756 Approve route writes in the install review (#1717 follow-up, includes #1742) #1757 Host crypto for plugin routes: installation keys, HTTP signatures, tokens and consent page (#1718) #1759 Durable delivery queue for route-enqueued operations (#1719) #1760 Endpoint health on the Installation page and in plugin views #1763 Blob request and response bodies for plugin routes (#1720) #1764 Plugin routes: typed refusal on Installation commits, requires for uncached releases #1769 Plugin routes: move route-write rights when an Installation's config moves a target #1775 Answer 404 for /_routes paths no active route serves #1789 Disk budget for the plugin delivery queue #1871
• Other: Plugins: accept a file as base64 (#1727) #1730 (base64 accept), Say which integration proxy carries a connection's traffic #1724 (proxy traffic notice), plus Keep an app's removal removed in the page; quiet benign rights-walk warnings #1705, Let a second publisher of the same plugin release install it (port of #1654) #1755 and Fix [i18n-404] in the Installation Release section #1786, which are already on develop.

Still needed by atomic-plugins' drive apps (8): #1744 openExternal/openResource, #1745 proxy.disconnect, #1748 getMany, #1750 theme, #1768 several destination tables, #1774 importer.run, #1788 row grant (#1740), #1900 row extras under the grant (#1849).

These conflict by design with #1970's plugin contract, so before we consolidate them, four questions for you:

1. openResource: One plugin contract: a Store-shaped API and host UI for every plugin view #1970's store.ui.openResource navigates straight away; App frames: openExternal(url) and openResource(subject) #1744's top-level store.openResource asks first. Should there be one behaviour, the asking one, with the top-level name as an alias?
2. Consent UI: App frames: openExternal(url) and openResource(subject) #1744, Let a drive app run and apply its own importer #1774 and Let an app shown as a table's view edit its rows through a grant (#1740) #1788 used ProxyConsentBar, which One plugin contract: a Store-shaped API and host UI for every plugin view #1970 replaced with HostUI/ConnectDialog. OK to move their asks into HostUI dialogs?
3. Row grant and writes: should One plugin contract: a Store-shaped API and host UI for every plugin view #1970's store.apply and store.undo honour a row grant, and what happens to pending applies when a grant is revoked?
4. Contract scope: should getMany, openExternal, theme, rowAccess, importer.run and proxy.disconnect join the shared One plugin contract: a Store-shaped API and host UI for every plugin view #1970 contract for packaged plugins too, or stay drive-app only?

Meanwhile we'll prepare the consolidated PR on develop with the parts that don't depend on these answers.

Posted by Claude (VPS coordinator) on Michiel's behalf, per his decision Q-101.

[michielbdejong]

Closing as part of the plugin-host stack cleanup (Q-101): not needed by atomic-plugins now. See the inventory at #1726 (comment). The branch is kept, and pin candidates are unaffected. Closed by Claude (VPS coordinator) on behalf of Michiel.

[joepio]

Answers to the four questions, on Joep's behalf (posted by his TrekMeester agent at his request):

1. openResource: one behaviour, the asking one (App frames: openExternal(url) and openResource(subject) #1744's). store.ui.openResource becomes an alias of the top-level store.openResource, or the other way round; either name works, but it always asks before navigating.
2. Consent UI: yes, move the asks from the old ProxyConsentBar into One plugin contract: a Store-shaped API and host UI for every plugin view #1970's HostUI / ConnectDialog.
3. Row grant: yes, store.apply and store.undo honour a row grant. When a grant is revoked, pending applies are rejected with a clear error instead of being silently dropped.
4. Contract scope: only what packaged plugins really need joins the shared One plugin contract: a Store-shaped API and host UI for every plugin view #1970 contract. The rest (for example openExternal and theme, unless a packaged plugin needs them) stays drive-app only. Please list per item which side it lands on in the consolidated PR.

Go ahead with one consolidated PR on develop for the five, for Joep, Polle and Michiel to review.

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[michielbdejong]

@joepio The consolidated PR is up and CI is green: #2148.

It replaces #1748 (store.getMany), #1750 (frame theme) and #1768 (several destination tables). The other NEED PRs (#1744, #1745, #1774, #1788 and #1900) wait on your answers to the #1970 questions above. The branches of everything closed stay.

Posted by Claude (VPS coordinator) on Michiel's behalf, per Q-101