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Add support for enabling experimental plan mode via config file #143

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Add support for enabling experimental plan mode via config file #143

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dae84b5
feat: add experimental.plan_mode config option
ariane-emory Jan 31, 2026
cb8b025
Merge branch 'dev' into feat/configurable-new-plan-mode
ariane-emory Feb 1, 2026
984080c
Merge branch 'dev' into feat/configurable-new-plan-mode
ariane-emory Feb 2, 2026
2e57289
Merge branch 'dev' into feat/configurable-new-plan-mode
ariane-emory Feb 3, 2026
0cea950
Merge branch 'dev' into feat/configurable-new-plan-mode
ariane-emory Feb 4, 2026
3e13dfb
Merge branch 'dev' into feat/configurable-new-plan-mode
ariane-emory Feb 4, 2026
ccfce83
Merge branch 'dev' into feat/configurable-new-plan-mode
ariane-emory Feb 6, 2026
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8 changes: 8 additions & 0 deletions packages/opencode/src/config/config.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -1177,6 +1177,7 @@ export namespace Config {
.positive()
.optional()
.describe("Timeout in milliseconds for model context protocol (MCP) requests"),
plan_mode: z.boolean().optional().describe("Enable experimental plan mode"),
})
.optional(),
})
Expand Down Expand Up @@ -1350,6 +1351,13 @@ export namespace Config {
return state().then((x) => x.config)
}

export async function experimentalPlanMode() {
// Environment variable takes precedence
if (Flag.OPENCODE_EXPERIMENTAL_PLAN_MODE) return true
const config = await get()
return config.experimental?.plan_mode === true
}

export async function getGlobal() {
return global()
}
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3 changes: 2 additions & 1 deletion packages/opencode/src/session/prompt.ts
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Expand Up @@ -34,6 +34,7 @@ import { spawn } from "child_process"
import { Command } from "../command"
import { $, fileURLToPath } from "bun"
import { ConfigMarkdown } from "../config/markdown"
import { Config } from "../config/config"
import { SessionSummary } from "./summary"
import { NamedError } from "@opencode-ai/util/error"
import { fn } from "@/util/fn"
Expand Down Expand Up @@ -1220,7 +1221,7 @@ export namespace SessionPrompt {
if (!userMessage) return input.messages

// Original logic when experimental plan mode is disabled
if (!Flag.OPENCODE_EXPERIMENTAL_PLAN_MODE) {
if (!(await Config.experimentalPlanMode())) {
if (input.agent.name === "plan") {
userMessage.parts.push({
id: Identifier.ascending("part"),
Expand Down
2 changes: 1 addition & 1 deletion packages/opencode/src/tool/registry.ts
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Expand Up @@ -114,7 +114,7 @@ export namespace ToolRegistry {
ApplyPatchTool,
...(Flag.OPENCODE_EXPERIMENTAL_LSP_TOOL ? [LspTool] : []),
...(config.experimental?.batch_tool === true ? [BatchTool] : []),
...(Flag.OPENCODE_EXPERIMENTAL_PLAN_MODE && Flag.OPENCODE_CLIENT === "cli" ? [PlanExitTool, PlanEnterTool] : []),
...((await Config.experimentalPlanMode()) && Flag.OPENCODE_CLIENT === "cli" ? [PlanExitTool, PlanEnterTool] : []),
...custom,
]
}
Expand Down