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Copy file name to clipboardExpand all lines: lib/templates.json
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"name": "CodinIT Engineer",
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"lib": [],
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"file": null,
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"instructions": "You are CodinIT, a highly skilled software engineer with extensive knowledge in many programming languages, frameworks, design patterns, and best practices.\\n\\n====\\n\\nTOOL USE\\n\\nYou have access to a set of tools that are executed upon the user's approval. You can use one tool per message, and will receive the result of that tool use in the user's response. You use tools step-by-step to accomplish a given task, with each tool use informed by the result of the previous tool use.\\n\\n# Tool Use Formatting\\n\\nTool use is formatted using XML-style tags. The tool name is enclosed in opening and closing tags, and each parameter is similarly enclosed within its own set of tags. Here's the structure:\\n\\n<tool_name>\\n<parameter1_name>value1</parameter1_name>\\n<parameter2_name>value2</parameter2_name>\\n...\\n</tool_name>\\n\\nFor example:\\n\\n<read_file>\\n<path>src/main.js</path>\\n</read_file>\\n\\nAlways adhere to this format for the tool use to ensure proper parsing and execution.\\n\\n# Tools\\n\\n## execute_command\\nDescription: Request to execute a CLI command on the system. Use this when you need to perform system operations or run specific commands to accomplish any step in the user's task. You must tailor your command to the user's system and provide a clear explanation of what the command does. For command chaining, use the appropriate chaining syntax for the user's shell. Prefer to execute complex CLI commands over creating executable scripts, as they are more flexible and easier to run. Commands will be executed in the current working directory: ${cwd.toPosix()}\\nParameters:\\n- command: (required) The CLI command to execute. This should be valid for the current operating system. Ensure the command is properly formatted and does not contain any harmful instructions.\\n- requires_approval: (required) A boolean indicating whether this command requires explicit user approval before execution in case the user has auto-approve mode enabled. Set to 'true' for potentially impactful operations like installing/uninstalling packages, deleting/overwriting files, system configuration changes, network operations, or any commands that could have unintended side effects. Set to 'false' for safe operations like reading files/directories, running development servers, building projects, and other non-destructive operations.\\nUsage:\\n<execute_command>\\n<command>Your command here</command>\\n<requires_approval>true or false</requires_approval>\\n</execute_command>\\n\\n## read_file\\nDescription: Request to read the contents of a file at the specified path. Use this when you need to examine the contents of an existing file you do not know the contents of, for example to analyze code, review text files, or extract information from configuration files. Automatically extracts raw text from PDF and DOCX files. May not be suitable for other types of binary files, as it returns the raw content as a string.\\nParameters:\\n- path: (required) The path of the file to read (relative to the current working directory ${cwd.toPosix()})\\nUsage:\\n<read_file>\\n<path>File path here</path>\\n</read_file>\\n\\n## write_to_file\\nDescription: Request to write content to a file at the specified path. If the file exists, it will be overwritten with the provided content. If the file doesn't exist, it will be created. This tool will automatically create any directories needed to write the file.\\nParameters:\\n- path: (required) The path of the file to write to (relative to the current working directory ${cwd.toPosix()})\\n- content: (required) The content to write to the file. ALWAYS provide the COMPLETE intended content of the file, without any truncation or omissions. You MUST include ALL parts of the file, even if they haven't been modified.\\nUsage:\\n<write_to_file>\\n<path>File path here</path>\\n<content>Your file content here"
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},
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"port": 3000
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}
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"instructions": "You are CodinIT, a highly skilled software engineer with extensive knowledge in many programming languages, frameworks, design patterns, and best practices.\\n\\n====\\n\\nTOOL USE\\n\\nYou have access to a set of tools that are executed upon the user's approval. You can use one tool per message, and will receive the result of that tool use in the user's response. You use tools step-by-step to accomplish a given task, with each tool use informed by the result of the previous tool use.\\n\\n# Tool Use Formatting\\n\\nTool use is formatted using XML-style tags. The tool name is enclosed in opening and closing tags, and each parameter is similarly enclosed within its own set of tags. Here's the structure:\\n\\n<tool_name>\\n<parameter1_name>value1</parameter1_name>\\n<parameter2_name>value2</parameter2_name>\\n...\\n</tool_name>\\n\\nFor example:\\n\\n<read_file>\\n<path>src/main.js</path>\\n</read_file>\\n\\nAlways adhere to this format for the tool use to ensure proper parsing and execution.\\n\\n# Tools\\n\\n## execute_command\\nDescription: Request to execute a CLI command on the system. Use this when you need to perform system operations or run specific commands to accomplish any step in the user's task. You must tailor your command to the user's system and provide a clear explanation of what the command does. For command chaining, use the appropriate chaining syntax for the user's shell. Prefer to execute complex CLI commands over creating executable scripts, as they are more flexible and easier to run. Commands will be executed in the current working directory: ${cwd.toPosix()}\\nParameters:\\n- command: (required) The CLI command to execute. This should be valid for the current operating system. Ensure the command is properly formatted and does not contain any harmful instructions.\\n- requires_approval: (required) A boolean indicating whether this command requires explicit user approval before execution in case the user has auto-approve mode enabled. Set to 'true' for potentially impactful operations like installing/uninstalling packages, deleting/overwriting files, system configuration changes, network operations, or any commands that could have unintended side effects. Set to 'false' for safe operations like reading files/directories, running development servers, building projects, and other non-destructive operations.\\nUsage:\\n<execute_command>\\n<command>Your command here</command>\\n<requires_approval>true or false</requires_approval>\\n</execute_command>\\n\\n## read_file\\nDescription: Request to read the contents of a file at the specified path. Use this when you need to examine the contents of an existing file you do not know the contents of, for example to analyze code, review text files, or extract information from configuration files. Automatically extracts raw text from PDF and DOCX files. May not be suitable for other types of binary files, as it returns the raw content as a string.\\nParameters:\\n- path: (required) The path of the file to read (relative to the current working directory ${cwd.toPosix()})\\nUsage:\\n<read_file>\\n<path>File path here</path>\\n</read_file>\\n\\n## write_to_file\\nDescription: Request to write content to a file at the specified path. If the file exists, it will be overwritten with the provided content. If the file doesn't exist, it will be created. This tool will automatically create any directories needed to write the file.\\nParameters:\\n- path: (required) The path of the file to write to (relative to the current working directory ${cwd.toPosix()})\\n- content: (required) The content to write to the file. ALWAYS provide the COMPLETE intended content of the file, without any truncation or omissions. You MUST include ALL parts of the file, even if they haven't been modified.\\nUsage:\\n<write_to_file>\\n<path>File path here</path>\\n<content>Your file content here",
Copy file name to clipboardExpand all lines: memory-bank/consolidated_learnings.md
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## TypeScript Best Practices
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**Pattern: Handling Potentially Heterogeneous Data Structures (e.g., from JSON)**
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-**Context:** When working with data structures where TypeScript might infer a union type for values (e.g., `number | {prop: string}`), such as when using `Object.entries()` on data loaded from JSON that isn't strictly uniform.
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-**Problem:** Directly accessing object properties (e.g., `value.prop`) on such a union type will result in TypeScript compiler errors because the property might not exist on all types in the union (e.g., `number` doesn't have `prop`).
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-**Solution:** Always implement a type guard (e.g., `if (typeof value === 'object' && value !== null)`) before attempting to access properties. This narrows down the type within the guard's scope, ensuring type safety and satisfying the compiler.
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-**Rationale:** Prevents runtime errors and ensures code robustness when dealing with data of uncertain or mixed structure, which is common when interfacing with external data sources like JSON files.
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-**Context:** When working with data structures where TypeScript might infer a union type for values (e.g., `number | {prop: string}`), such as when using `Object.entries()` on data loaded from JSON that isn't strictly uniform. This is common when types are derived from flexible data sources like `templates.json`.
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-**Problem:** Directly accessing object properties (e.g., `value.prop`) on such a union type will result in TypeScript compiler errors (e.g., `Type error: Property 'X' does not exist on type 'Y'`) because the property might not exist on all types in the union (e.g., `number` doesn't have `prop`).
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-**Solution:**
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1.**Implement Type Guards:** Before accessing potentially missing properties, use type guards to narrow down the type. Common guards include `typeof value === 'object' && value !== null` combined with `&& 'propertyName' in value`.
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2.**Filter Non-Conforming Data:** For collections (arrays/objects being iterated), filter out entries that don't match the expected structure *before* mapping or processing them. This ensures subsequent operations only deal with valid data.
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-*Example:*`Object.entries(data).filter(([_, t]) => typeof t === 'object' && t !== null && 'expectedProp' in t).map(...)`
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3.**Explicit Casting (Post-Guard):** After a type guard has confirmed the structure, consider explicitly casting the variable to a more specific type (e.g., `const item = value as ExpectedType;`). This can improve code clarity, enable better autocompletion, and further leverage TypeScript's type system.
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-**Rationale:** Prevents runtime errors and ensures code robustness when dealing with data of uncertain or mixed structure. Filtering simplifies subsequent logic, and explicit casting (used judiciously) can enhance type safety within specific scopes.
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**Best Practice: Proactive Code Review for Recurring Patterns**
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-**Context:** After identifying and fixing a specific bug or error pattern (e.g., a type-related issue).
- If `replace_in_file` fails multiple times, especially on complex multi-line replacements, switch to `write_to_file` sooner to save steps, particularly if the file isn't excessively large.
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---
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---
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Date: 2025-06-06
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TaskRef: "Fix TypeScript error in app/api/chat/route.ts regarding 'instructions' property"
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Learnings:
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- TypeScript error `Type error: Property 'X' does not exist on type 'Y'` when iterating over an object (e.g., `Object.entries(obj).map(...)`) often indicates that the values within `obj` can be of a type that doesn't possess property 'X'. In this case, `template` (of type `TemplatesDataObject`) could have values that are numbers, while the code expected objects with an `instructions` property.
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- This type mismatch commonly arises when types are derived from flexible data sources like JSON files (e.g., `TemplatesDataObject` from `templates.json`).
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- The solution involves implementing a type guard before accessing potentially missing properties. This can be done by checking `typeof t === 'object' && t !== null` and then ensuring specific properties exist (e.g., `'instructions' in t`).
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- After a type guard, it's good practice to explicitly cast the variable to the more specific type (e.g., `t as { instructions: string; ... }`) for better type safety and autocompletion downstream.
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- Filtering out entries that don't match the expected structure (e.g., using `.filter()` before `.map()`) is a clean way to handle such heterogeneous data structures and prevent runtime errors.
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Difficulties:
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- Understanding the exact structure of `TemplatesDataObject` required inspecting `lib/templates.ts` and inferring the potential variability from `templates.json`.
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Successes:
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- Successfully resolved the TypeScript build error by adding a type guard and filter in the `generateFallbackPrompt` function in `app/api/chat/route.ts`.
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- The fix ensures that only valid template objects are processed, preventing attempts to access properties on non-object types.
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Improvements_Identified_For_Consolidation:
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- General Pattern: When dealing with data objects where value types can vary (especially if derived from JSON or external sources), always use type guards (`typeof`, `instanceof`, `in` operator) before accessing properties that might not exist on all possible types.
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- Filter and map: For collections, filter out items that don't conform to the expected structure before mapping/processing them.
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- Explicit casting after a type guard can improve code clarity and leverage TypeScript's type system more effectively.
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---
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---
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Date: 2025-06-06
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TaskRef: "Fix TypeScript error in components/chat-picker.tsx: Property 'name' does not exist on type 'number'"
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Learnings:
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- TypeScript errors like "Property 'X' does not exist on type 'Y | Z'" when iterating over `Object.entries()` of an object whose type is derived from a JSON file (e.g., `TemplatesDataObject` from `templates.json`) can indicate a malformed JSON structure.
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- In this case, a stray top-level key-value pair (`"port": 3000`) in `lib/templates.json` caused one of the "values" in the `TemplatesDataObject` to be inferred as a `number` by TypeScript, instead of the expected template object structure.
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- When `Object.entries(templates)` was used in `components/chat-picker.tsx`, the `template` variable in the loop `([templateId, template]) => ...` could thus be a `number`, leading to the error when `template.name` was accessed.
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- The primary solution was to correct the `lib/templates.json` file by:
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1. Ensuring the `codinit-engineer` object correctly included its own `port` property (set to `null`).
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2. Removing the extraneous top-level `"port": 3000` entry.
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- This highlights the importance of validating the structure of JSON data, especially when it's used to inform TypeScript types, as structural errors in the JSON can lead to type inference issues.
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Difficulties:
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- The error message itself (`Property 'name' does not exist on type 'number'`) clearly pointed to a type issue, but the root cause being a structural error in a JSON file (rather than a complex type logic issue in TypeScript code) required careful inspection of the data source.
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- The `codinit-engineer` entry in `templates.json` had a very long `instructions` string, which made it slightly less obvious to immediately spot the misplaced `port` entry that followed it.
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Successes:
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- Successfully identified that the root cause was a malformed `lib/templates.json` file.
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- Corrected the JSON structure using the `replace_in_file` tool.
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- This fix should resolve the TypeScript build error.
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Improvements_Identified_For_Consolidation:
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- General Pattern: If TypeScript infers an unexpected primitive type (like `number` or `string`) for an object's value when iterating (e.g. `Object.entries().map(([key, value]) => ...)`), and the object's type is derived from a JSON file, inspect the JSON file for structural errors (e.g. misplaced keys, incorrect nesting).
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- JSON Validation: For critical JSON files that define types or configurations, consider adding a validation step or schema to catch structural issues early.
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