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feat(core): use freeform tool input on models that support it - #61703
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The change works as described. I ran OpenCode from source on the base and with this PR against a local fake OpenAI-compatible endpoint, with the patch tool offered on a gpt-* model:
- With
capabilities.freeform: ["lark"],patchgoes out as a custom tool with the Lark grammar, and a raw patch call from the model reaches the executor as{ patchText }and applies the patch. - Without the setting, and on the base,
patchstays a JSON function tool and nothing else changes.
The Core tests touched here pass (113), as do the AI freeform tests (14), and tsc passes for core, schema, plugin and ai.
Public API changes. All are additions and backwards compatible:
- Plugin API:
Tool.Infogains an optionalfreeform(text|regex|lark), for both Effect and Promise plugins. - Schema, OpenAPI and client:
Model.Capabilitiesgains an optionalfreeform: string[]. - Config:
providers.<id>.models.<id>.capabilities.freeformis a new optional key. LLM.Freeformin@opencode/ainow re-exportsTool.Freeformfrom schema, with the same shape.
One concern that doesn't block a merge (inline): the freeform formats models.dev lists for a model's original API stay on the model when config points it at a different package or proxy.
| const fallback = base ?? Capabilities.default() | ||
| return { | ||
| tools: config.tools ?? fallback.tools, | ||
| freeform: (config.freeform ?? base?.freeform)?.slice(), |
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freeform is a property of the models.dev API that route picked, but it stays on the model when config sends the model somewhere else. That happens with config.package or a provider package (the inherit path in config/plugin/provider.ts clears model.package but keeps the capabilities), and with a proxy baseURL. For example, an openai model moved to @opencode/ai/providers/openai-compatible behind LiteLLM keeps lark. Every request then sends patch as a custom tool, and the README says unsupported endpoints return a provider error with no fallback to JSON. It may be worth dropping the inherited freeform when the package changes, unless the config sets freeform itself.
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My earlier point is addressed: catalog freeform formats are no longer inherited when config sends a provider or model to a different package, baseURL or modelID, and formats set explicitly in capabilities.freeform still apply. I checked it with the CLI against a fake OpenAI-compatible endpoint. With a custom baseURL plus explicit freeform: ["lark"], patch still goes out as a custom tool and applies. The Core tests pass (114), as does core tsc. The new commits don't change the public API, and I have no new concerns.
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The new commits look fine. Unknown models.dev format names are now filtered out instead of being passed through, and freeform is narrowed to text | regex | lark. I re-ran the CLI against a fake OpenAI-compatible endpoint: with freeform: ["lark"], patch still goes out as a custom tool and applies. The Core tests pass (114), and tsc passes for core and schema.
Public API: this adds the Tool.FreeformFormat schema (OpenAPI and client), and freeform in Model.Capabilities and model config capabilities becomes ("text" | "regex" | "lark")[] instead of string[]. Nothing released uses the key yet, so it is still backwards compatible. No new concerns.
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This push only removes the README paragraph about Core's freeform selection from packages/ai/README.md, which puts it back to the text on dev. No code changed, and the plugin and models docs pages still cover the behaviour. The public API is the same as in my last review. No new concerns.
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The Code Mode support works as described. The new Core test passes: freeform tools list tools.x(input: string), and both string and object calls reach the executor as the object input. The full packages/codemode suite passes (1500), and tsc passes for codemode and core.
Public API: @opencode/codemode's Tool.make options and Tool type gain an optional freeformField, and the "expects at most one…" error text now says "argument" instead of "input object". Both are backwards compatible. No new concerns.
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This push looks sound. Code Mode now finds the string field from the input schema itself, and only for a single required string field; other shapes keep their object signature. The codemode tests pass (1504, including the new eligible and ineligible cases), as do Core's tool-execute/tool-patch tests, and tsc passes for codemode and core.
Public API: in @opencode/codemode, the Tool.make option freeformField?: string becomes stringInput?: boolean, and the Tool field becomes stringInputField. freeformField was added earlier in this PR and never released, so this is backwards compatible. No new concerns.
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The flat Code Mode option works as described. The codemode suite passes (1505), as do Core's tool-execute/tool-patch/model-request tests (62), and tsc passes for codemode, core, plugin and schema. I also probed the single-object case by hand. A positional call (scan({recursive:true})), a named call (scan({options:{…}})) and a two-argument call each produced the expected input object, and a raw JSON-Schema tool rendered and bound correctly.
Public API: plugin Tool.Options gains an optional flat?: boolean, only on Code Mode tools. In @opencode/codemode, stringInput becomes flat?: boolean and the Tool field stringInputField becomes parameters; both were added earlier in this PR and never released. Named-object calls keep working, so this is backwards compatible. No new concerns.
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This push looks sound: the plugin-level options.flat is gone, and Core turns positional input on only for freeform tools with one required string field. Core's tool-execute/tool-patch tests pass (57), and tsc passes for core, schema and plugin.
Public API: compared with my last review, the plugin Tool.Options.flat addition is withdrawn (never released). What remains is optional freeform on plugin Tool.Info, freeform in Model.Capabilities and model config capabilities (new Tool.FreeformFormat), and flat on @opencode/codemode tools. All are backwards compatible. No new concerns.
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This push is a rebase onto newer dev; the PR's own changes are unchanged apart from merging next to dev's new ...generation spread in model-request.ts. After the rebase, the focused Core tests (130) and the Code Mode suite (1505) pass, and core tsc passes. The public API is the same as in my last review. No new concerns.
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This push rebases onto newer dev and adapts the Code Mode binding to dev's durable tools: normal, durable-start and resume calls now all bind arguments through the shared decode. The new suspend/resume test covers both named and positional input. The Code Mode suite (1641) and the focused Core tests (148) pass, and tsc passes for codemode and core. The public API is the same as in my last review. No new concerns.
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The simplified version works: against a fake OpenAI-compatible endpoint with freeform: ["text","lark"], execute goes out as a text custom tool, and the model's raw code runs and returns its result. The Code Mode suite (1636) and the focused Core tests (148, plus 249 in session-runner) pass, and tsc passes for codemode and core.
My earlier thread stays open. The route-override handling was removed in favour of a documented capabilities.freeform: [] opt-out. With execute now declaring text, a proxy in front of a catalog model that lists text would also receive execute as a custom tool.
Public API changes since my last review:
@opencode/codemodeno longer has theflatoption (never released).- In Code Mode, every tool whose input is exactly one required string field now shows
tools.x(field: string)and accepts a bare string. This covers plugin and MCP tools too, not only freeform ones, and changes the catalog text the model sees. Object calls still work. - The built-in
executetool declares thetextfreeform format.
All of these are backwards compatible.
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This push looks sound. The positional string call form is now limited to tools that declare freeform, so other plugin and MCP tools keep their object signatures in the Code Mode catalog, as on dev. The Code Mode suite (1636) and the focused Core tests (285) pass, and tsc passes for codemode and core.
Public API: @opencode/codemode's Tool.make options and Tool type gain an optional freeform?: boolean, and the catalog no longer changes for non-freeform tools. The rest is as in my last review: optional freeform on plugin Tool.Info, Model.Capabilities.freeform and model config capabilities.freeform, and execute declaring text. All of it is backwards compatible. No new concerns.
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This push only changes how models.dev freeform formats are decoded: they are now read as strings, and names this version doesn't recognise are still dropped. The models.dev parsing and request-format tests pass (31), and core tsc passes. The public API is the same as in my last review. No new concerns.
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This push is a small schema refactor: the freeform schema is renamed Tool.Freeform and an unused type alias is dropped. Nothing else used the old name, and it doesn't appear in the OpenAPI spec or the client. The Core models and request-format tests (31) and the AI freeform tests (14) pass, and tsc passes for core, schema and ai. The public API is the same as in my last review. No new concerns.
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* fix(codemode): return compact JSON results (anomalyco#63258) * feat(core): support MCP events in the MCP client (anomalyco#63254) Co-authored-by: Adam <2363879+adamdotdevin@users.noreply.github.com> * ci(deploy): mint short-lived cloudflare tokens from the token issuer * feat(core): wake a session on MCP events with a watch tool (anomalyco#63269) Co-authored-by: Adam <2363879+adamdotdevin@users.noreply.github.com> * fix(core): send saved keys during local model discovery (anomalyco#63266) * refactor(data): strict dev/production stages and data naming - services/data/stage.ts: stage(mode) throws on anything but dev or production, used by all three configs, build.ts and deploy.ts - packages/stats -> packages/data (@opencode/data-app, -core, -server) - StatsSyncWorkflow -> DataSyncWorkflow, instance ids data-hourly-/data-history-, Data* resource keys, data sync log lines - worker, route, workflow and cron names unchanged * feat(core): tell agents when they are in a fork (anomalyco#63235) Co-authored-by: OpenCode Agent <opencode-agent[bot]@users.noreply.github.com> * fix(deploy): run Cloudflare deploys from verified artifacts behind pinned targets Repository code outside .github/ needs no review, but every deploy job held a Cloudflare token strong enough to write any Worker on the account (the data sync Workflow PUT has no per-Worker permission). A dev merge could therefore overwrite production Workers. Split each service into a build job with no environment, secrets, or OIDC token that uploads a SHA256SUMS artifact, and a deploy job in dev|production that checks out only .github/release/, verifies the artifact against the build job's digest, installs the cf/wrangler CLI pinned here, and runs only deploy-*.sh. The deploy scripts treat the artifact as data and refuse it unless its resolved config equals the pinned target in .github/release/targets/ exactly: Worker names, routes, custom domains, crons, Workflow names, and bindings. For cf services the pinned config is what cf reads. That is what makes an account-wide token safe, and it keeps production out of reach of a dev merge. Adds the cf 1.0.0-beta.12 and wrangler 4.110.0 lockfiles the deploy jobs install with npm ci --ignore-scripts. * fix(core): fetch Console instructions and skills only when the config says the workspace has them (anomalyco#63259) * fix(ci): treat require-digests=false as off in verify-artifacts The download action always sets OPENCODE_REQUIRE_DIGESTS (false by default), so testing for a non-empty value required digests for release artifacts that legitimately have none and broke sign-macos, sign-windows and publish-attestations. Compare the value to true instead. * fix(site): show download and install menus again after closing them (anomalyco#63311) * feat(app): add the New timeline experiment (anomalyco#63295) * fix(app): snap vertical tab preview to its tab (anomalyco#63074) * feat(app): limit Recent sidebar to 7 days and 30 rows, align its hover preview (anomalyco#63313) * fix(tui): give plugins a live theme view (anomalyco#63306) * fix(app): accept a pasted redirect URL for provider sign-in (anomalyco#63315) Co-authored-by: Aiden Cline <aidenpcline@gmail.com> * fix(session): measure tps from the first streamed token (anomalyco#63321) * chore(protocol): refresh generated openapi for the first-token event (anomalyco#63324) * fix(app): show only the branch in the new session row (anomalyco#63182) * refactor(codemode): remove the legacy interpreter; the VM is the only engine (anomalyco#62642) * fix(core): keep the truncated preview when tool output can't be saved (anomalyco#63334) * fix(app): show the agent switcher by default (anomalyco#63337) * feat(process-daemon): pipe mode on Windows (anomalyco#63196) * fix(update): verify access identity on admin routes (anomalyco#63340) * fix(app): remeasure the desktop drag area when direction changes (anomalyco#63347) * chore: remove beta what's new and visual svgs (anomalyco#63325) * feat(core): report subagent results to the parent every time a child goes idle (anomalyco#63209) * chore(process-daemon): release 0.5.1 (anomalyco#63366) * refactor(process-daemon): simplify Windows pipe mode (anomalyco#63346) * chore(process-daemon): allow 60 minutes for Windows release builds (anomalyco#63378) * feat(core): always run subagents in the background (anomalyco#63382) * refactor(core): remove the unused foreground path from SubagentJob (anomalyco#63223) * fix(core): defer restart wakes until parent attempts are counted (anomalyco#63367) * chore(process-daemon): release 0.5.2 (anomalyco#63381) * feat(ai): add Google Decisions (anomalyco#63369) * fix(acp): stream the parent's reaction to background subagent reports (anomalyco#63395) * chore(core): bump gitlab-ai-provider to 6.24.0 (anomalyco#63342) * ci: deploy dev workers in anomaly-dev (anomalyco#63379) * read dev data sync from the dev lake * fix(core): show the start of tool output that exceeds the limit (anomalyco#63272) * feat(site): simplify the docs header menu and move the V1 notice into the header (anomalyco#63399) * chore(site): update OpenCode link cards (anomalyco#63401) * refactor(core): remove leftover foreground subagent and reattach code (anomalyco#63392) * refactor(app): remove leftover foreground subagent UI (anomalyco#63391) * fix(tui): show the subagent card instead of launch instructions in mini scrollback (anomalyco#63389) * chore(site): remove the /ide page (anomalyco#63386) Co-authored-by: Adam <2363879+adamdotdevin@users.noreply.github.com> * ci: run macos build jobs on blacksmith (anomalyco#63397) * fix(storybook): provide settings context to stories * fix(app): avoid transforms on scrolling composer suggestions * fix(app): keep mobile tab menu open when closing tabs * fix(desktop): update build-windows.bat to post-merge workflow The merge adopted the upstream desktop workflow, which folded prebuild into build and removed package:win. Drop the stale prebuild step and package the Windows NSIS installer directly with electron-builder. * chore: ignore Astro and Cloudflare build artifacts Ignore the generated .astro content modules, .wrangler miniflare state, and the generated services/www/public/cli.json schema so local builds of the site packages no longer show up as untracked files. * fix(core): keep ephemeral server credentials from wiping shared auth sessions A stdio/ACP auxiliary server mints its own random password and shares the data directory (and database) with the canonical server. On startup, AuthSession.configure treated the verifier mismatch as a credential change: it deleted the whole auth_session table, wiping the canonical server's remembered logins, and adopted a random verifier. Thread an ephemeral flag from the CLI (set when the password was minted, not from env/config) down to configure, which now skips the reconcile for such a process. The canonical server's behavior, including invalidation on a real credential change, is unchanged. * fix(desktop): update build-mac.sh to the post-merge build workflow The script called bun run prebuild and bun run package:mac, neither of which exists in packages/desktop/package.json, so it aborted before producing a build. Mirror build-windows.bat: run bun run build, then bunx electron-builder --mac --publish never --config electron-builder.config.ts. * feat(app): add sortable schedule list with persisted preference The schedules panel gains a sort selector with three modes: name (alphabetical, the default), lastRun (most recent first, never-run tasks last), and status (enabled first, name order within each group). The choice is stored with the app's local preference storage (home.schedules.sort) and restored when the panel reopens. A neutral review pass pinned the never-run ordering (second undefined fixture plus a numeric-aware name pair) and replaced the -Infinity comparator sentinel with -1, since lastRunAtMs is a NonNegativeInt, so the comparator always returns a finite number. * feat(session-ui): show full input in expanded generic tool calls --------- Co-authored-by: David Hill <1879069+iamdavidhill@users.noreply.github.com> Co-authored-by: Adam <2363879+adamdotdevin@users.noreply.github.com> Co-authored-by: Kit Langton <kit.langton@gmail.com> Co-authored-by: vprdev <mail@alanrice.me> Co-authored-by: Aiden Cline <aidenpcline@gmail.com> Co-authored-by: Aiden Cline <63023139+rekram1-node@users.noreply.github.com> Co-authored-by: Luke Parker <10430890+Hona@users.noreply.github.com> Co-authored-by: exe.dev user <exedev@anton.exe.xyz> Co-authored-by: James Long <longster@gmail.com> Co-authored-by: Dan Smolsky <78942835+Tarquinen@users.noreply.github.com> Co-authored-by: opencode-agent[bot] <219766164+opencode-agent[bot]@users.noreply.github.com> Co-authored-by: Daniel <daniel@anoma.ly> Co-authored-by: smagnuso <smagnuso@gmail.com> Co-authored-by: Dan Smolsky <dannysmo@gmail.com> Co-authored-by: 2SinceJuly <202121119+2SinceJuly@users.noreply.github.com> Co-authored-by: Jack <jack@anoma.ly> Co-authored-by: Stefan Avram <98915060+Slickstef11@users.noreply.github.com> Co-authored-by: usrnk1 <7547651+usrnk1@users.noreply.github.com> Co-authored-by: Ludvig Rask <74653458+ludvigrask@users.noreply.github.com> Co-authored-by: Dax <mail@thdxr.com> Co-authored-by: Ryan Skidmore <4580448+ryanskidmore@users.noreply.github.com> Co-authored-by: Frank <frank@anoma.ly> Co-authored-by: Jay <air@live.ca> Co-authored-by: MrMushrooooom <19261047+MrMushrooooom@users.noreply.github.com> Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com> Co-authored-by: Liyang Zhu <tomzhu1024@outlook.com> Co-authored-by: OpeOginni <107570612+OpeOginni@users.noreply.github.com> Co-authored-by: Simon Klee <hello@simonklee.dk> Co-authored-by: Dax Raad <d@ironbay.co> Co-authored-by: Kyle Bush <157062883+Kyle-j-bush@users.noreply.github.com> Co-authored-by: Sebastian <hasta84@gmail.com> Co-authored-by: OpenCode Agent <opencode-agent[bot]@users.noreply.github.com> Co-authored-by: Aarav Sareen <96787824+arvsrn@users.noreply.github.com> Co-authored-by: Swapnil Devesh <sid.swapnildevesh@gmail.com> Co-authored-by: Filip <34747899+neriousy@users.noreply.github.com> Co-authored-by: Vladimir Glafirov <vglafirov@gitlab.com>
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Issue for this PR
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Type of change
What does this PR do?
Core previously discarded the freeform formats listed on each models.dev API. Tools like
patchandexecutehad to ask for a JSON string even when the model could write the text directly.Tools can now declare
freeformalongside their usual input.patchdeclares its Lark grammar andexecutedeclares plain text. Core checks the selected model's formats before each request:patchdeclares Larklark{ patchText }{ patchText }Support comes only from the model's models.dev entry or
capabilities.freeformin config, never from the provider package. Pointing a catalog provider at another base URL keeps the listed formats; setcapabilities.freeform: []if that proxy rejects them. A custom provider gets JSON tools unless its config lists formats.Inside Code Mode, a freeform tool drops the object wrapper, the way Codex calls
apply_patch. Core marks the toolfreeformwhen it hands it to Code Mode, and Code Mode handles the rest. Both calls deliver{ id: "OPS-42" }to validation, hooks and the handler:Other tools keep their object signatures.
patchitself stays a direct tool for now (codemode: false).How did you verify your code works?
The Code Mode suite passed on both engines (1,636 tests each), including a test that a freeform tool takes both call forms and a plain tool keeps its object signature. Focused Core tests passed for config, models.dev parsing, request formats,
executeandpatch.A live eval on
gpt-6.1-solandgpt-6-luna(96 trials) comparedexecuteas a JSON tool and as freeform text. Every first call was plain JavaScript with no code fence or JSON wrapping, and every first program ran.bun run checkand Core and Code Mode's official TypeScript checks passed.Visual
Checklist
Added by the opencode bot (AI-generated).
Public API: adds optional
freeform(text/regex/lark) to pluginTool.Info,Model.Capabilities.freeform(OpenAPI/client, newTool.FreeformFormatschema), model configcapabilities.freeform, andfreeform?: booleanto@opencode/codemodetools (backwards compatible)