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{tool, examples}: support read_multiple_files tool for file tool set (#361)
Support read_multiple_files tool for file tool set.
In the previous debugagent example, we can see that the read_file tool
is called multiple times in succession. However, calling tools requires
LLM to initiate these calls, which is time-consuming. Therefore, the
read_multiple_files tool is provided to read multiple files in a single
tool call, improving the debugagent's processing speed.
Compared to the previous 10 tool calls, only 5 are now required.
- Save a file called 'hello.txt' with content 'Hello, World!'
@@ -95,111 +95,72 @@ Available tools: save_file, read_file, list_file, search_file, search_content, r
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ℹ️ Note: All file operations will be performed in the base directory
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👤 You: The current directory is a code project. Can you help me fix the bug?
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🤖 Assistant: I'll help you fix the bug in your code project. First, let me explore the project structure to understand what we're working with.
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👤 You: 🤖 Assistant: I'd be happy to help you fix the bug! To get started, I need to understand the project structure and the codebase. Let me first explore the current directory to see what kind of project this is.
✅ Tool result (ID: call_00_HbOP1G2E410C9TKlajhsPY6L): {"base_directory":"project","path":".","files":["README.md","expect.txt","go.mod","input.txt","main.go","output.txt"],"folders":["counter"],"message":"Found 6 files and 1 folders in ."}
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✅ Tool result (ID: call_00_NgmwIy6qMBDas1fm0CYPU9PZ): {"base_directory":"project","path":"","files":["README.md","expect.txt","go.mod","input.txt","main.go","output.txt"],"folders":["counter"],"message":"Found 6 files and 1 folders in base directory"}
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Let me examine the main files to understand the project structure and identify potential bugs:
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This appears to be a Go project. Let me examine the main files to understand the structure and identify the bug:
✅ Tool result (ID: call_00_HtevwNGY6sZVY0sGxym3txiJ): {"base_directory":"project","file_name":"main.go","contents":"//\n// Tencent is pleased to support the open source community by making trpc-agent-go available.\n//\n// Copyright (C) 2025 Tencent. All rights reserved.\n//\n// trpc-agent-go is licensed under the Apache License Version 2.0.\n//\n//\n\n// package main is a example project with bug.\npackage main\n\nimport (\n\t\"log\"\n\t\"os\"\n\t\"strconv\"\n\t\"strings\"\n\n\t\"trpc.group/trpc-go/trpc-agent-go/examples/debugagent/project/counter\"\n)\n\nfunc main() {\n\tcontent, err := os.ReadFile(\"input.txt\")\n\tif err != nil {\n\t\tlog.Fatal(err)\n\t}\n\tn, err := strconv.Atoi(strings.TrimSpace(string(content)))\n\tif err != nil {\n\t\tlog.Fatal(err)\n\t}\n\tcounter := counter.GetCounter(n)\n\tos.WriteFile(\"output.txt\", []byte(strconv.Itoa(counter)), 0644)\n}\n","message":"Successfully read main.go, start line: 1, end line: 34, total lines: 34"}
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✅ Tool result (ID: call_00_IPpAT8AFnUG3ZmzcKstPJoZ5): {"base_directory":"project","files":[{"file_name":"README.md","contents":"input.txt: Program input\noutput.txt: Program output\nexpect.txt: Program expected output\n\nWe've discovered that the program's actual output doesn't match our expectations. Could you help us debug this?\n","message":"Successfully read README.md, total lines: 6"},{"file_name":"go.mod","contents":"module trpc.group/trpc-go/trpc-agent-go/examples/debugagent/project\n\ngo 1.24.1\n","message":"Successfully read go.mod, total lines: 4"},{"file_name":"main.go","contents":"//\n// Tencent is pleased to support the open source community by making trpc-agent-go available.\n//\n// Copyright (C) 2025 Tencent. All rights reserved.\n//\n// trpc-agent-go is licensed under the Apache License Version 2.0.\n//\n//\n\n// package main is a example project with bug.\npackage main\n\nimport (\n\t\"log\"\n\t\"os\"\n\t\"strconv\"\n\t\"strings\"\n\n\t\"trpc.group/trpc-go/trpc-agent-go/examples/debugagent/project/counter\"\n)\n\nfunc main() {\n\tcontent, err := os.ReadFile(\"input.txt\")\n\tif err != nil {\n\t\tlog.Fatal(err)\n\t}\n\tn, err := strconv.Atoi(strings.TrimSpace(string(content)))\n\tif err != nil {\n\t\tlog.Fatal(err)\n\t}\n\tcounter := counter.GetCounter(n)\n\tos.WriteFile(\"output.txt\", []byte(strconv.Itoa(counter)), 0644)\n}\n","message":"Successfully read main.go, total lines: 34"}],"message":"Read 3 file(s)"}
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Now let me check the counter package and the input/output files to understand the issue:
✅ Tool result (ID: call_00_81p4bcqdUhV1hKtTuKFUASK8): {"base_directory":"project","file_name":"counter/counter.go","contents":"//\n// Tencent is pleased to support the open source community by making trpc-agent-go available.\n//\n// Copyright (C) 2025 Tencent. All rights reserved.\n//\n// trpc-agent-go is licensed under the Apache License Version 2.0.\n//\n//\n\n// package counter implements a counter.\npackage counter\n\nimport \"sync/atomic\"\n\nfunc GetCounter(n int) int {\n\tvar counter int64\n\tfor i := 0; i \u003c n; i++ {\n\t\tgo func() {\n\t\t\tatomic.AddInt64(\u0026counter, 1)\n\t\t}()\n\t}\n\treturn int(counter)\n}\n","message":"Successfully read counter/counter.go, start line: 1, end line: 24, total lines: 24"}
✅ Tool result (ID: call_00_vHV6YCLhCW70BW7YuU10ykGx): {"base_directory":"project","file_name":"input.txt","contents":"100000","message":"Successfully read input.txt, start line: 1, end line: 1, total lines: 1"}
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✅ Tool result (ID: call_00_07r9jkkklLsKwFQNFF7rc9Yw): {"base_directory":"project","files":[{"file_name":"counter/counter.go","contents":"//\n// Tencent is pleased to support the open source community by making trpc-agent-go available.\n//\n// Copyright (C) 2025 Tencent. All rights reserved.\n//\n// trpc-agent-go is licensed under the Apache License Version 2.0.\n//\n//\n\n// package counter implements a counter.\npackage counter\n\nimport \"sync/atomic\"\n\nfunc GetCounter(n int) int {\n\tvar counter int64\n\tfor i := 0; i \u003c n; i++ {\n\t\tgo func() {\n\t\t\tatomic.AddInt64(\u0026counter, 1)\n\t\t}()\n\t}\n\treturn int(counter)\n}\n","message":"Successfully read counter/counter.go, total lines: 24"},{"file_name":"expect.txt","contents":"100000","message":"Successfully read expect.txt, total lines: 1"},{"file_name":"input.txt","contents":"100000","message":"Successfully read input.txt, total lines: 1"},{"file_name":"output.txt","contents":"97876","message":"Successfully read output.txt, total lines: 1"}],"message":"Read 4 file(s)"}
✅ Tool result (ID: call_00_1VC04qSLOUSKYBVGvkAWJX2J): {"base_directory":"project","file_name":"output.txt","contents":"97876","message":"Successfully read output.txt, start line: 1, end line: 1, total lines: 1"}
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Now I can see the bug! The issue is in the `counter/counter.go` file. The problem is that the main function returns immediately after spawning goroutines, without waiting for them to complete. The goroutines are still running when the function returns, so the counter value is not fully incremented.
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Let me also check if there's a README that might provide more context:
✅ Tool result (ID: call_00_E8Os7PrurC09MQHPGcdy7X72): {"base_directory":"project","file_name":"README.md","contents":"input.txt: Program input\noutput.txt: Program output\nexpect.txt: Program expected output\n\nWe've discovered that the program's actual output doesn't match our expectations. Could you help us debug this?\n","message":"Successfully read README.md, start line: 1, end line: 6, total lines: 6"}
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Now I can see the issue! The problem is in the `counter/counter.go` file. The program is spawning multiple goroutines to increment a counter using `atomic.AddInt64`, but it's not waiting for all goroutines to complete before returning the result.
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Perfect! The issue is clear now. The program reads 100000 from input.txt, spawns 100000 goroutines to increment a counter, but returns before all goroutines finish executing. This is why the output (97876) is less than the expected value (100000).
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The bug is that the `GetCounter` function returns immediately after starting all the goroutines, without waiting for them to finish. This means the counter value returned is incomplete - some goroutines haven't had time to execute yet.
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The fix is to add synchronization to wait for all goroutines to complete before returning. I'll use a `sync.WaitGroup` to fix this:
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Let me fix this by adding proper synchronization using a WaitGroup:
Arguments: {"file_name": "counter/counter.go", "old_string": "import \"sync/atomic\"\n\nfunc GetCounter(n int) int {\n\tvar counter int64\n\tfor i := 0; i < n; i++ {\n\t\tgo func() {\n\t\t\tatomic.AddInt64(&counter, 1)\n\t\t}()\n\t}\n\treturn int(counter)\n}", "new_string": "import (\n\t\"sync\"\n\t\"sync/atomic\"\n)\n\nfunc GetCounter(n int) int {\n\tvar counter int64\n\tvar wg sync.WaitGroup\n\t\n\tfor i := 0; i < n; i++ {\n\t\twg.Add(1)\n\t\tgo func() {\n\t\t\tdefer wg.Done()\n\t\t\tatomic.AddInt64(&counter, 1)\n\t\t}()\n\t}\n\t\n\twg.Wait()\n\treturn int(counter)\n}"}
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🔄 Executing tools...
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✅ Tool result (ID: call_00_EVnrOAunnIK53rENeMoRsbQ2): {"base_directory":"project","file_name":"counter/counter.go","message":"Successfully replaced 1 of 1 occurrence(s) in 'counter/counter.go'"}
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✅ Tool result (ID: call_00_i62KTD9uzX0enr32vjsGKkrW): {"base_directory":"project","file_name":"counter/counter.go","message":"Successfully replaced 1 of 1 occurrence(s) in 'counter/counter.go'"}
- Code execution: emit a single fenced `bash` block, or write a script then immediately run it.
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4.**File Operation Execution** (when applicable): File tools run and return structured results.
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5.**Code Execution** (when applicable): The CodeExecution processor extracts the fenced block and runs it in the working dir, then emits two post‑processing events — one with the code, one with the result. The UI prints the result cleanly without duplicating the code block.
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