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feat(opencode): inject file in markdown agents #34964

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c7608b8
feat(config): substitute {file:}/{env:} tokens in markdown agent bodies
vic-stan Jul 2, 2026
e962f25
test(config): cover {file:} substitution in markdown agent bodies
vic-stan Jul 2, 2026
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15 changes: 13 additions & 2 deletions packages/opencode/src/config/agent.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,7 @@ import { ConfigAgentV1 } from "@opencode-ai/core/v1/config/agent"
import { configEntryNameFromPath } from "./entry-name"
import * as ConfigMarkdown from "./markdown"
import { ConfigParse } from "./parse"
import { ConfigVariable } from "./variable"

export async function load(dir: string) {
const result: Record<string, ConfigAgentV1.Info> = {}
Expand All @@ -20,11 +21,16 @@ export async function load(dir: string) {
if (!md) continue

const name = configEntryNameFromPath(path.relative(dir, item), ["agent/", "agents/"])
const prompt = await ConfigVariable.substitute({
type: "path",
path: item,
text: md.content.trim() || String(md.data.prompt ?? ""),
})

const config = {
name,
...md.data,
prompt: md.content.trim(),
prompt,
}
result[config.name] = ConfigParse.schema(ConfigAgentV1.Info, config, item)
}
Expand All @@ -42,10 +48,15 @@ export async function loadMode(dir: string) {
const md = await ConfigMarkdown.parse(item).catch(() => undefined)
if (!md) continue

const prompt = await ConfigVariable.substitute({
type: "path",
path: item,
text: md.content.trim() || String(md.data.prompt ?? ""),
})
const config = {
name: configEntryNameFromPath(path.relative(dir, item), ["mode/", "modes/"]),
...md.data,
prompt: md.content.trim(),
prompt,
}
const parsed = Schema.decodeUnknownExit(ConfigAgentV1.Info)(config, { errors: "all", propertyOrder: "original" })
if (Exit.isSuccess(parsed)) {
Expand Down
35 changes: 35 additions & 0 deletions packages/opencode/test/config/config.test.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -824,6 +824,41 @@ Nested agent prompt`,
}),
)

it.instance("substitutes {file:} tokens in markdown agent body", () =>
Effect.gen(function* () {
const test = yield* TestInstance
yield* FSUtil.use.writeWithDirs(
path.join(test.directory, ".opencode", "agents", "python-coder.md"),
`---
mode: subagent
---
{file:./skill.txt}`,
)
yield* FSUtil.use.writeWithDirs(path.join(test.directory, ".opencode", "agents", "skill.txt"), "Loaded from file")

const config = yield* Config.use.get()
expect(config.agent?.["python-coder"]?.prompt).toBe("Loaded from file")
}),
)

it.instance("falls back to frontmatter prompt when body is empty and substitutes {file:} tokens", () =>
Effect.gen(function* () {
const test = yield* TestInstance
yield* FSUtil.use.writeWithDirs(
path.join(test.directory, ".opencode", "agents", "python-coder.md"),
`---
mode: subagent
prompt: "{file:./skill.txt}"
---
`,
)
yield* FSUtil.use.writeWithDirs(path.join(test.directory, ".opencode", "agents", "skill.txt"), "Frontmatter prompt")

const config = yield* Config.use.get()
expect(config.agent?.["python-coder"]?.prompt).toBe("Frontmatter prompt")
}),
)

it.instance("loads commands from .opencode/command (singular)", () =>
Effect.gen(function* () {
const test = yield* TestInstance
Expand Down
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