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Make sample 318 stdin-runnable for the daily Rig sampler #303

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pelikhan merged 2 commits into from
Jul 30, 2026
Merged

Make sample 318 stdin-runnable for the daily Rig sampler #303

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Copilot Jul 30, 2026
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fix: make sample 318 stdin-runnable
Copilot Jul 30, 2026
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53 changes: 12 additions & 41 deletions skills/rig/samples/318-ts-barrel-re-exporter.md
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Original file line number Diff line number Diff line change
Expand Up @@ -3,50 +3,21 @@
```rig
import { agent, p, s, defineTool, repair } from "rig";
import { readFile } from "node:fs/promises";

// Agent role: generate a barrel index.ts that re-exports all exported symbols from TypeScript files in a directory.
// Agent role: generate a barrel file for exported symbols in skills/rig/engines.
const tsBarrelReExporter = agent({
model: "small",
input: s.object({
sourceDir: s.path,
outputFile: s.path,
}),
instructions: p`You are a TypeScript barrel re-exporter.

Find TypeScript source files to barrel (excluding index files):
${p.bash("find . -name '*.ts' -not -name 'index.ts' -not -name '*.test.ts' -not -name '*.d.ts' -not -path '*/node_modules/*' | head -50")}

For each TypeScript file in the source directory, call extractExportedSymbols to discover exported names.
Then write the barrel file to ${p.writeInput("outputFile", "barrelContent")}.
Return the declared output.`,
tools: [
defineTool("extractExportedSymbols", {
description: "Read a TypeScript file and extract all top-level exported symbol names",
parameters: s.object({ filePath: s.path }),
async handler({ filePath }) {
const content = await readFile(filePath, "utf8");
const symbols: string[] = [];
const exportRegex = /^export\s+(?:(?:default\s+)?(?:function|class|const|let|var|type|interface|enum)\s+(\w+)|(\{[^}]+\}))/gm;
for (const match of content.matchAll(exportRegex)) {
if (match[1]) {
symbols.push(match[1]);
} else if (match[2]) {
const named = match[2].replace(/[{}]/g, "").split(",").map((s: string) => s.trim().split(/\s+as\s+/)[0].trim()).filter(Boolean);
symbols.push(...named);
}
}
return { filePath, symbols };
},
}),
],
output: s.object({
exports: s.array(s.string),
outputFile: s.path,
totalExports: s.int,
filesScanned: s.int,
}),
instructions: p`Generate a TypeScript barrel for skills/rig/engines from ${p.bash("find skills/rig/engines -name '*.ts' -not -name 'index.ts' -not -name '*.d.ts' | head -20")}. Use extractExportedSymbols for each file, set outputFile to /tmp/rig-barrel.ts, write barrelContent to ${p.writeOutput("barrelContent", "/tmp/rig-barrel.ts")}, and return the declared output.`,

@github-actions github-actions Bot Jul 30, 2026

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[/codebase-design] The instructions are now a single dense line, sacrificing the readability that made the original multi-line template literal easy to scan.

💡 Suggested refactor

Split the template literal across lines:

instructions: p`Generate a TypeScript barrel for skills/rig/engines
from ${p.bash("find skills/rig/engines -name '*.ts' -not -name 'index.ts' -not -name '*.d.ts' | head -20")}.
Use extractExportedSymbols for each file, set outputFile to /tmp/rig-barrel.ts,
write barrelContent to ${p.writeOutput("barrelContent", "/tmp/rig-barrel.ts")},
and return the declared output.`,

This matches the style of other samples and keeps each prompt step scannable at a glance.

tools: [defineTool("extractExportedSymbols", {
description: "Read a TypeScript file and extract top-level exported symbol names",
parameters: s.object({ filePath: s.path }),
async handler({ filePath }) {
const content = await readFile(filePath, "utf8");
const symbols = [...content.matchAll(/^export\s+(?:(?:default\s+)?(?:function|class|const|let|var|type|interface|enum)\s+(\w+)|(\{[^}]+\}))/gm)].flatMap((match) => match[1] ? [match[1]] : match[2]!.replace(/[{}]/g, "").split(",").map((name) => name.trim().split(/\s+as\s+/)[0].trim()).filter(Boolean));
return { filePath, symbols };
},
})],

@github-actions github-actions Bot Jul 30, 2026

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[/codebase-design] The tool definition and output schema are now one-liners, which keeps file size down but harms readability in a sample whose purpose is to teach. Samples are documentation first.

💡 Suggested refactor

Expand the output schema and tool definition to multi-line form, consistent with every other sample in the directory:

  output: s.object({
    barrelContent: s.string,
    exports: s.array(s.string),
    outputFile: s.path,
    totalExports: s.int,
    filesScanned: s.int,
  }),

Similarly, break the tool handler body out of the one-liner .flatMap chain for legibility.

output: s.object({ barrelContent: s.string, exports: s.array(s.string), outputFile: s.path, totalExports: s.int, filesScanned: s.int }),
addons: [repair()],
});

export default tsBarrelReExporter;
```