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Trim history.jsonl when history.max_bytes is set (#6242)

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This PR honors the `history.max_bytes` configuration parameter by
trimming `history.jsonl` whenever it grows past the configured limit.
While appending new entries we retain the newest record, drop the oldest
lines to stay within the byte budget, and serialize the compacted file
back to disk under the same lock to keep writers safe.
This commit is contained in:
liam
2025-12-02 17:01:05 -05:00
committed by GitHub
parent 77c457121e
commit 4d4778ec1c
4 changed files with 319 additions and 80 deletions
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docs/config.md
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@@ -841,6 +841,11 @@ To disable this behavior, configure `[history]` as follows:
persistence = "none" # "save-all" is the default value
```
To cap the size of `history.jsonl`, set `history.max_bytes` to a positive byte
count. When the file grows beyond the limit, Codex removes the oldest entries,
compacting the file down to roughly 80% of the hard cap while keeping the newest
record intact. Omitting the option—or setting it to `0`—disables pruning.
### file_opener
Identifies the editor/URI scheme to use for hyperlinking citations in model output. If set, citations to files in the model output will be hyperlinked using the specified URI scheme so they can be ctrl/cmd-clicked from the terminal to open them.
@@ -933,64 +938,64 @@ Valid values:
## Config reference
| Key | Type / Values | Notes |
| ------------------------------------------------ | ----------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------- |
| `model` | string | Model to use (e.g., `gpt-5.1-codex-max`). |
| `model_provider` | string | Provider id from `model_providers` (default: `openai`). |
| `model_context_window` | number | Context window tokens. |
| `tool_output_token_limit` | number | Token budget for stored function/tool outputs in history (default: 2,560 tokens). |
| `approval_policy` | `untrusted` \| `on-failure` \| `on-request` \| `never` | When to prompt for approval. |
| `sandbox_mode` | `read-only` \| `workspace-write` \| `danger-full-access` | OS sandbox policy. |
| `sandbox_workspace_write.writable_roots` | array<string> | Extra writable roots in workspace‑write. |
| `sandbox_workspace_write.network_access` | boolean | Allow network in workspace‑write (default: false). |
| `sandbox_workspace_write.exclude_tmpdir_env_var` | boolean | Exclude `$TMPDIR` from writable roots (default: false). |
| `sandbox_workspace_write.exclude_slash_tmp` | boolean | Exclude `/tmp` from writable roots (default: false). |
| `notify` | array<string> | External program for notifications. |
| `tui.animations` | boolean | Enable terminal animations (welcome screen, shimmer, spinner). Defaults to true; set to `false` to disable visual motion. |
| `instructions` | string | Currently ignored; use `experimental_instructions_file` or `AGENTS.md`. |
| `features.<feature-flag>` | boolean | See [feature flags](#feature-flags) for details |
| `mcp_servers.<id>.command` | string | MCP server launcher command (stdio servers only). |
| `mcp_servers.<id>.args` | array<string> | MCP server args (stdio servers only). |
| `mcp_servers.<id>.env` | map<string,string> | MCP server env vars (stdio servers only). |
| `mcp_servers.<id>.url` | string | MCP server url (streamable http servers only). |
| `mcp_servers.<id>.bearer_token_env_var` | string | environment variable containing a bearer token to use for auth (streamable http servers only). |
| `mcp_servers.<id>.enabled` | boolean | When false, Codex skips starting the server (default: true). |
| `mcp_servers.<id>.startup_timeout_sec` | number | Startup timeout in seconds (default: 10). Timeout is applied both for initializing MCP server and initially listing tools. |
| `mcp_servers.<id>.tool_timeout_sec` | number | Per-tool timeout in seconds (default: 60). Accepts fractional values; omit to use the default. |
| `mcp_servers.<id>.enabled_tools` | array<string> | Restrict the server to the listed tool names. |
| `mcp_servers.<id>.disabled_tools` | array<string> | Remove the listed tool names after applying `enabled_tools`, if any. |
| `model_providers.<id>.name` | string | Display name. |
| `model_providers.<id>.base_url` | string | API base URL. |
| `model_providers.<id>.env_key` | string | Env var for API key. |
| `model_providers.<id>.wire_api` | `chat` \| `responses` | Protocol used (default: `chat`). |
| `model_providers.<id>.query_params` | map<string,string> | Extra query params (e.g., Azure `api-version`). |
| `model_providers.<id>.http_headers` | map<string,string> | Additional static headers. |
| `model_providers.<id>.env_http_headers` | map<string,string> | Headers sourced from env vars. |
| `model_providers.<id>.request_max_retries` | number | Per‑provider HTTP retry count (default: 4). |
| `model_providers.<id>.stream_max_retries` | number | SSE stream retry count (default: 5). |
| `model_providers.<id>.stream_idle_timeout_ms` | number | SSE idle timeout (ms) (default: 300000). |
| `project_doc_max_bytes` | number | Max bytes to read from `AGENTS.md`. |
| `profile` | string | Active profile name. |
| `profiles.<name>.*` | various | Profile‑scoped overrides of the same keys. |
| `history.persistence` | `save-all` \| `none` | History file persistence (default: `save-all`). |
| `history.max_bytes` | number | Currently ignored (not enforced). |
| `file_opener` | `vscode` \| `vscode-insiders` \| `windsurf` \| `cursor` \| `none` | URI scheme for clickable citations (default: `vscode`). |
| `tui` | table | TUI‑specific options. |
| `tui.notifications` | boolean \| array<string> | Enable desktop notifications in the tui (default: true). |
| `hide_agent_reasoning` | boolean | Hide model reasoning events. |
| `check_for_update_on_startup` | boolean | Check for Codex updates on startup (default: true). Set to `false` only if updates are centrally managed. |
| `show_raw_agent_reasoning` | boolean | Show raw reasoning (when available). |
| `model_reasoning_effort` | `minimal` \| `low` \| `medium` \| `high` | Responses API reasoning effort. |
| `model_reasoning_summary` | `auto` \| `concise` \| `detailed` \| `none` | Reasoning summaries. |
| `model_verbosity` | `low` \| `medium` \| `high` | GPT‑5 text verbosity (Responses API). |
| `model_supports_reasoning_summaries` | boolean | Force‑enable reasoning summaries. |
| `model_reasoning_summary_format` | `none` \| `experimental` | Force reasoning summary format. |
| `chatgpt_base_url` | string | Base URL for ChatGPT auth flow. |
| `experimental_instructions_file` | string (path) | Replace built‑in instructions (experimental). |
| `experimental_use_exec_command_tool` | boolean | Use experimental exec command tool. |
| `projects.<path>.trust_level` | string | Mark project/worktree as trusted (only `"trusted"` is recognized). |
| `tools.web_search` | boolean | Enable web search tool (deprecated) (default: false). |
| `tools.view_image` | boolean | Enable or disable the `view_image` tool so Codex can attach local image files from the workspace (default: true). |
| `forced_login_method` | `chatgpt` \| `api` | Only allow Codex to be used with ChatGPT or API keys. |
| `forced_chatgpt_workspace_id` | string (uuid) | Only allow Codex to be used with the specified ChatGPT workspace. |
| `cli_auth_credentials_store` | `file` \| `keyring` \| `auto` | Where to store CLI login credentials (default: `file`). |
| Key | Type / Values | Notes |
| ------------------------------------------------ | ----------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------- |
| `model` | string | Model to use (e.g., `gpt-5.1-codex-max`). |
| `model_provider` | string | Provider id from `model_providers` (default: `openai`). |
| `model_context_window` | number | Context window tokens. |
| `tool_output_token_limit` | number | Token budget for stored function/tool outputs in history (default: 2,560 tokens). |
| `approval_policy` | `untrusted` \| `on-failure` \| `on-request` \| `never` | When to prompt for approval. |
| `sandbox_mode` | `read-only` \| `workspace-write` \| `danger-full-access` | OS sandbox policy. |
| `sandbox_workspace_write.writable_roots` | array<string> | Extra writable roots in workspace‑write. |
| `sandbox_workspace_write.network_access` | boolean | Allow network in workspace‑write (default: false). |
| `sandbox_workspace_write.exclude_tmpdir_env_var` | boolean | Exclude `$TMPDIR` from writable roots (default: false). |
| `sandbox_workspace_write.exclude_slash_tmp` | boolean | Exclude `/tmp` from writable roots (default: false). |
| `notify` | array<string> | External program for notifications. |
| `tui.animations` | boolean | Enable terminal animations (welcome screen, shimmer, spinner). Defaults to true; set to `false` to disable visual motion. |
| `instructions` | string | Currently ignored; use `experimental_instructions_file` or `AGENTS.md`. |
| `features.<feature-flag>` | boolean | See [feature flags](#feature-flags) for details |
| `mcp_servers.<id>.command` | string | MCP server launcher command (stdio servers only). |
| `mcp_servers.<id>.args` | array<string> | MCP server args (stdio servers only). |
| `mcp_servers.<id>.env` | map<string,string> | MCP server env vars (stdio servers only). |
| `mcp_servers.<id>.url` | string | MCP server url (streamable http servers only). |
| `mcp_servers.<id>.bearer_token_env_var` | string | environment variable containing a bearer token to use for auth (streamable http servers only). |
| `mcp_servers.<id>.enabled` | boolean | When false, Codex skips starting the server (default: true). |
| `mcp_servers.<id>.startup_timeout_sec` | number | Startup timeout in seconds (default: 10). Timeout is applied both for initializing MCP server and initially listing tools. |
| `mcp_servers.<id>.tool_timeout_sec` | number | Per-tool timeout in seconds (default: 60). Accepts fractional values; omit to use the default. |
| `mcp_servers.<id>.enabled_tools` | array<string> | Restrict the server to the listed tool names. |
| `mcp_servers.<id>.disabled_tools` | array<string> | Remove the listed tool names after applying `enabled_tools`, if any. |
| `model_providers.<id>.name` | string | Display name. |
| `model_providers.<id>.base_url` | string | API base URL. |
| `model_providers.<id>.env_key` | string | Env var for API key. |
| `model_providers.<id>.wire_api` | `chat` \| `responses` | Protocol used (default: `chat`). |
| `model_providers.<id>.query_params` | map<string,string> | Extra query params (e.g., Azure `api-version`). |
| `model_providers.<id>.http_headers` | map<string,string> | Additional static headers. |
| `model_providers.<id>.env_http_headers` | map<string,string> | Headers sourced from env vars. |
| `model_providers.<id>.request_max_retries` | number | Per‑provider HTTP retry count (default: 4). |
| `model_providers.<id>.stream_max_retries` | number | SSE stream retry count (default: 5). |
| `model_providers.<id>.stream_idle_timeout_ms` | number | SSE idle timeout (ms) (default: 300000). |
| `project_doc_max_bytes` | number | Max bytes to read from `AGENTS.md`. |
| `profile` | string | Active profile name. |
| `profiles.<name>.*` | various | Profile‑scoped overrides of the same keys. |
| `history.persistence` | `save-all` \| `none` | History file persistence (default: `save-all`). |
| `history.max_bytes` | number | Maximum size of `history.jsonl` in bytes; when exceeded, history is compacted to ~80% of this limit by dropping oldest entries. |
| `file_opener` | `vscode` \| `vscode-insiders` \| `windsurf` \| `cursor` \| `none` | URI scheme for clickable citations (default: `vscode`). |
| `tui` | table | TUI‑specific options. |
| `tui.notifications` | boolean \| array<string> | Enable desktop notifications in the tui (default: true). |
| `hide_agent_reasoning` | boolean | Hide model reasoning events. |
| `check_for_update_on_startup` | boolean | Check for Codex updates on startup (default: true). Set to `false` only if updates are centrally managed. |
| `show_raw_agent_reasoning` | boolean | Show raw reasoning (when available). |
| `model_reasoning_effort` | `minimal` \| `low` \| `medium` \| `high` | Responses API reasoning effort. |
| `model_reasoning_summary` | `auto` \| `concise` \| `detailed` \| `none` | Reasoning summaries. |
| `model_verbosity` | `low` \| `medium` \| `high` | GPT‑5 text verbosity (Responses API). |
| `model_supports_reasoning_summaries` | boolean | Force‑enable reasoning summaries. |
| `model_reasoning_summary_format` | `none` \| `experimental` | Force reasoning summary format. |
| `chatgpt_base_url` | string | Base URL for ChatGPT auth flow. |
| `experimental_instructions_file` | string (path) | Replace built‑in instructions (experimental). |
| `experimental_use_exec_command_tool` | boolean | Use experimental exec command tool. |
| `projects.<path>.trust_level` | string | Mark project/worktree as trusted (only `"trusted"` is recognized). |
| `tools.web_search` | boolean | Enable web search tool (deprecated) (default: false). |
| `tools.view_image` | boolean | Enable or disable the `view_image` tool so Codex can attach local image files from the workspace (default: true). |
| `forced_login_method` | `chatgpt` \| `api` | Only allow Codex to be used with ChatGPT or API keys. |
| `forced_chatgpt_workspace_id` | string (uuid) | Only allow Codex to be used with the specified ChatGPT workspace. |
| `cli_auth_credentials_store` | `file` \| `keyring` \| `auto` | Where to store CLI login credentials (default: `file`). |