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feat: add env var to disable file change summaries #200

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feat: add env var to disable file change summaries #200

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89 changes: 47 additions & 42 deletions src/proxy/server.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -413,7 +413,8 @@ export function createProxyServer(config: Partial<ProxyConfig> = {}): ProxyServe
// PostToolUse hook tracks file changes from MCP tools (internal mode only).
// Catches write, edit, AND bash redirects (>, >>, tee, sed -i).
const mcpPrefix = `mcp__${adapter.getMcpServerName()}__`
const fileChangeHook = createFileChangeHook(fileChanges, mcpPrefix)
const trackFileChanges = !process.env.MERIDIAN_NO_FILE_CHANGES
const fileChangeHook = trackFileChanges ? createFileChangeHook(fileChanges, mcpPrefix) : undefined

const sdkHooks = passthrough
? {
Expand All @@ -434,7 +435,7 @@ export function createProxyServer(config: Partial<ProxyConfig> = {}): ProxyServe
}
: {
...(adapter.buildSdkHooks?.(body, sdkAgents) ?? {}),
PostToolUse: [fileChangeHook],
...(fileChangeHook ? { PostToolUse: [fileChangeHook] } : {}),
}

if (!stream) {
Expand Down Expand Up @@ -623,22 +624,24 @@ export function createProxyServer(config: Partial<ProxyConfig> = {}): ProxyServe
// Append file change summary:
// - Internal mode: fileChanges populated by PostToolUse hook
// - Passthrough mode: scan body.messages for executed tool_use blocks
if (passthrough && stopReason === "end_turn" && adapter.extractFileChangesFromToolUse) {
const passthroughChanges = extractFileChangesFromMessages(
body.messages || [],
adapter.extractFileChangesFromToolUse.bind(adapter)
)
fileChanges.push(...passthroughChanges)
}
const fileChangeSummary = formatFileChangeSummary(fileChanges)
if (fileChangeSummary) {
const lastTextBlock = [...contentBlocks].reverse().find((b) => b.type === "text")
if (lastTextBlock) {
lastTextBlock.text = (lastTextBlock.text as string) + fileChangeSummary
} else {
contentBlocks.push({ type: "text", text: fileChangeSummary.trimStart() })
if (trackFileChanges) {
if (passthrough && stopReason === "end_turn" && adapter.extractFileChangesFromToolUse) {
const passthroughChanges = extractFileChangesFromMessages(
body.messages || [],
adapter.extractFileChangesFromToolUse.bind(adapter)
)
fileChanges.push(...passthroughChanges)
}
const fileChangeSummary = formatFileChangeSummary(fileChanges)
if (fileChangeSummary) {
const lastTextBlock = [...contentBlocks].reverse().find((b) => b.type === "text")
if (lastTextBlock) {
lastTextBlock.text = (lastTextBlock.text as string) + fileChangeSummary
} else {
contentBlocks.push({ type: "text", text: fileChangeSummary.trimStart() })
}
claudeLog("response.file_changes", { mode: "non_stream", count: fileChanges.length })
}
claudeLog("response.file_changes", { mode: "non_stream", count: fileChanges.length })
}

// If no content at all, add a fallback text block
Expand Down Expand Up @@ -1038,7 +1041,7 @@ export function createProxyServer(config: Partial<ProxyConfig> = {}): ProxyServe
}

// Passthrough mode: scan body.messages for file changes on end_turn
if (passthrough && adapter.extractFileChangesFromToolUse) {
if (trackFileChanges && passthrough && adapter.extractFileChangesFromToolUse) {
const passthroughChanges = extractFileChangesFromMessages(
body.messages || [],
adapter.extractFileChangesFromToolUse.bind(adapter)
Expand All @@ -1047,30 +1050,32 @@ export function createProxyServer(config: Partial<ProxyConfig> = {}): ProxyServe
}

// Emit file change summary as a text block before closing
const streamFileChangeSummary = formatFileChangeSummary(fileChanges)
if (streamFileChangeSummary && messageStartEmitted) {
const fcBlockIndex = nextClientBlockIndex++
safeEnqueue(encoder.encode(
`event: content_block_start\ndata: ${JSON.stringify({
type: "content_block_start",
index: fcBlockIndex,
content_block: { type: "text", text: "" },
})}\n\n`
), "file_changes_block_start")
safeEnqueue(encoder.encode(
`event: content_block_delta\ndata: ${JSON.stringify({
type: "content_block_delta",
index: fcBlockIndex,
delta: { type: "text_delta", text: streamFileChangeSummary },
})}\n\n`
), "file_changes_text_delta")
safeEnqueue(encoder.encode(
`event: content_block_stop\ndata: ${JSON.stringify({
type: "content_block_stop",
index: fcBlockIndex,
})}\n\n`
), "file_changes_block_stop")
claudeLog("response.file_changes", { mode: "stream", count: fileChanges.length })
if (trackFileChanges) {
const streamFileChangeSummary = formatFileChangeSummary(fileChanges)
if (streamFileChangeSummary && messageStartEmitted) {
const fcBlockIndex = nextClientBlockIndex++
safeEnqueue(encoder.encode(
`event: content_block_start\ndata: ${JSON.stringify({
type: "content_block_start",
index: fcBlockIndex,
content_block: { type: "text", text: "" },
})}\n\n`
), "file_changes_block_start")
safeEnqueue(encoder.encode(
`event: content_block_delta\ndata: ${JSON.stringify({
type: "content_block_delta",
index: fcBlockIndex,
delta: { type: "text_delta", text: streamFileChangeSummary },
})}\n\n`
), "file_changes_text_delta")
safeEnqueue(encoder.encode(
`event: content_block_stop\ndata: ${JSON.stringify({
type: "content_block_stop",
index: fcBlockIndex,
})}\n\n`
), "file_changes_block_stop")
claudeLog("response.file_changes", { mode: "stream", count: fileChanges.length })
}
}

// Emit the final message_stop (we skipped all intermediate ones)
Expand Down