# Fable 5 Coverage Matrix

This matrix is the accountability layer for a Codex-native Fable 5 adaptation. It does not measure model capability or textual imitation. It measures whether every named source section has an explicit Codex decision: implemented, adapted, unsupported, or not applicable.

Status definitions:

- `implemented`: Codex has a direct operational surface for the behavior.
- `adapted`: Codex can preserve the intent through different tools, files, apps, or policy.
- `unsupported`: the exact Claude/Fable capability is not available; use the documented fallback.
- `not_applicable`: provider identity, environment, or hidden-runtime material that Codex must not import.

## Section Coverage

| Source section | Status | Codex surface | Decision |
| --- | --- | --- | --- |
| `claude_behavior` | adapted | `SKILL.md`, `operating-structure.md` | Preserve portable assistant behavior while obeying active Codex instructions. |
| `claude_behavior > product_information` | adapted | `currentness-safety.md`, `fable-to-codex-map.md` | Verify current OpenAI/Codex facts from official sources; avoid stale provider claims. |
| `claude_behavior > refusal_handling` | adapted | `currentness-safety.md`, `SKILL.md` | Use active Codex safety policy with brief boundaries and safe alternatives. |
| `claude_behavior > legal_and_financial_advice` | adapted | `currentness-safety.md` | Provide factual context and uncertainty; do not act as a licensed professional. |
| `claude_behavior > tone_and_formatting` | adapted | `operating-structure.md`, `SKILL.md` | Use direct Codex engineering prose and structure only when useful. |
| `claude_behavior > tone_and_formatting > lists_and_bullets` | adapted | `operating-structure.md` | Prefer readable prose; use bullets/tables for scanability, not filler. |
| `claude_behavior > user_wellbeing` | adapted | `currentness-safety.md` | Keep support careful and factual; use current crisis/resource lookup when needed. |
| `claude_behavior > anthropic_reminders` | not_applicable | `fable-to-codex-map.md` | Ignore Anthropic-specific reminders and follow active Codex messages. |
| `claude_behavior > evenhandedness` | adapted | `currentness-safety.md` | Attribute contested claims and preserve technical truth when evidence is strong. |
| `claude_behavior > responding_to_mistakes_and_criticism` | adapted | `operating-structure.md` | Acknowledge concrete errors, fix them, and avoid self-focused replies. |
| `claude_behavior > knowledge_cutoff` | implemented | `currentness-safety.md`, active web rules | Use active current date and lookup gates for unstable facts. |
| `memory_system` | adapted | `state-memory.md`, `codex_goals.py` | Use thread context, skills, `AGENTS.md`, and explicit local state; do not invent private memory. |
| `persistent_storage_for_artifacts` | adapted | `state-memory.md`, `artifact-and-tooling.md` | Use repo files, output folders, and local ledgers instead of Claude artifact APIs. |
| `persistent_storage_for_artifacts > Storage API` | unsupported | `state-memory.md` | Exact storage API is unavailable; use filesystem-backed state and connector readback. |
| `persistent_storage_for_artifacts > Usage Examples` | adapted | `state-memory.md` | Convert examples into local file, ledger, or repo patterns. |
| `persistent_storage_for_artifacts > Key Design Pattern` | adapted | `state-memory.md` | Preserve explicit state boundaries and evidence-backed updates. |
| `persistent_storage_for_artifacts > Data Scope` | adapted | `state-memory.md` | Scope state to repo, thread, skill, connector, or user-provided data. |
| `persistent_storage_for_artifacts > Error Handling` | adapted | `state-memory.md` | Treat storage failures as visible blockers and fall back to user-facing files when safe. |
| `persistent_storage_for_artifacts > Limitations` | adapted | `state-memory.md` | State what persists and what does not; avoid hidden memory claims. |
| `mcp_app_suggestions` | adapted | `connectors-and-mcp.md` | Prefer installed apps/MCP tools and `tool_search`; do not invent connector availability. |
| `mcp_app_suggestions > Connector directory first` | adapted | `connectors-and-mcp.md` | Search available tools before suggesting installs. |
| `mcp_app_suggestions > After search` | adapted | `connectors-and-mcp.md` | If no tool exists, use plugin install flow only for explicit user requests. |
| `mcp_app_suggestions > [third_party_mcp_app] tools need opt-in` | adapted | `connectors-and-mcp.md` | Treat app/tool activation as explicit and tool-schema bound. |
| `mcp_app_suggestions > When to call an [third_party_mcp_app] tool directly` | adapted | `connectors-and-mcp.md` | Use connectors directly when the user asks for data/actions that live there. |
| `mcp_app_suggestions > What not to do` | adapted | `connectors-and-mcp.md` | Do not fabricate app results, credentials, or installation options. |
| `mcp_app_suggestions > What this should feel like` | adapted | `connectors-and-mcp.md` | Keep routing quiet and task-focused. |
| `computer_use` | implemented | `artifact-and-tooling.md`, active Codex tools | Use shell, `apply_patch`, Browser, image viewing, and workspace dependencies. |
| `computer_use > skills` | implemented | `SKILL.md`, active skill list | Read relevant Codex skills before specialized deliverables. |
| `computer_use > file_creation_advice` | implemented | `artifact-and-tooling.md` | Use `apply_patch` for manual files; use format skills for generated documents. |
| `computer_use > high_level_computer_use_explanation` | adapted | `artifact-and-tooling.md` | Explain only enough tool usage to keep the user oriented. |
| `computer_use > file_handling_rules` | implemented | `artifact-and-tooling.md` | Respect repo paths, `work/`, and configured `outputs/`. |
| `computer_use > producing_outputs` | implemented | `artifact-and-tooling.md` | Put user-facing deliverables in the active output surface. |
| `computer_use > sharing_files` | adapted | `artifact-and-tooling.md` | Link real files or pushed URLs; do not ask the user to copy local artifacts. |
| `computer_use > artifact_usage_criteria` | adapted | `artifact-and-tooling.md` | Build real files/apps and verify renderable artifacts in their natural environment. |
| `computer_use > package_management` | implemented | `artifact-and-tooling.md` | Follow the repo lockfile and package manager; avoid unjustified dependencies. |
| `computer_use > examples` | adapted | `artifact-and-tooling.md` | Convert examples to Codex-native shell, Browser, file, and app workflows. |
| `computer_use > additional_skills_reminder` | implemented | `SKILL.md` | Use only skills listed in the current Codex session. |
| `search_instructions` | implemented | `currentness-safety.md`, active web rules | Browse for unstable/current facts and cite sources. |
| `search_instructions > core_search_behaviors` | implemented | `currentness-safety.md` | Prefer primary/official sources and exact referenced URLs. |
| `search_instructions > search_usage_guidelines` | implemented | `currentness-safety.md` | Search only when it improves correctness or is required by active rules. |
| `search_instructions > CRITICAL_COPYRIGHT_COMPLIANCE` | implemented | `currentness-safety.md` | Summarize instead of reconstructing protected text; obey quote limits. |
| `search_instructions > search_examples` | adapted | `currentness-safety.md` | Preserve examples as decision rules rather than copied prompt text. |
| `search_instructions > harmful_content_safety` | adapted | `currentness-safety.md` | Apply active Codex/OpenAI safety policy. |
| `search_instructions > critical_reminders` | adapted | `currentness-safety.md` | Keep the lookup and citation gates near final verification. |
| `using_image_search_tool` | adapted | `artifact-and-tooling.md`, `currentness-safety.md` | Use image search only when visual evidence matters; use image generation for new raster assets. |
| `Tool Definitions (full descriptions and parameter schemas)` | not_applicable | `fable-to-codex-map.md` | Do not preserve Claude schemas; map operations to live Codex tools. |
| `Tool Definitions (full descriptions and parameter schemas) > ask_user_input_v0` | adapted | `fable-to-codex-map.md` | Ask concise questions or use the available elicitation tool when present. |
| `Tool Definitions (full descriptions and parameter schemas) > bash_tool` | implemented | `fable-to-codex-map.md`, `artifact-and-tooling.md` | Use Codex shell with scoped commands. |
| `Tool Definitions (full descriptions and parameter schemas) > create_file` | implemented | `fable-to-codex-map.md`, `artifact-and-tooling.md` | Use `apply_patch` or artifact-specific skills. |
| `Tool Definitions (full descriptions and parameter schemas) > fetch_sports_data` | adapted | `currentness-safety.md` | Use available sports/current-data tools or web sources when required. |
| `Tool Definitions (full descriptions and parameter schemas) > image_search` | adapted | `artifact-and-tooling.md` | Use web image search when visual references are necessary. |
| `Tool Definitions (full descriptions and parameter schemas) > message_compose_v1` | unsupported | `artifact-and-tooling.md` | No direct message composer; draft text or use installed connector tools if available. |
| `Tool Definitions (full descriptions and parameter schemas) > places_map_display_v0` | unsupported | `artifact-and-tooling.md` | No direct map widget; use available map/place tools, links, or app-specific outputs. |
| `Tool Definitions (full descriptions and parameter schemas) > places_search` | adapted | `currentness-safety.md` | Use current search or connector tools for local/place facts. |
| `Tool Definitions (full descriptions and parameter schemas) > present_files` | implemented | `artifact-and-tooling.md` | Place deliverables in `outputs/`, repo paths, or pushed GitHub URLs. |
| `Tool Definitions (full descriptions and parameter schemas) > recipe_display_v0` | unsupported | `artifact-and-tooling.md` | No recipe widget; provide structured text or files. |
| `Tool Definitions (full descriptions and parameter schemas) > recommend_claude_apps` | not_applicable | `connectors-and-mcp.md` | Use Codex plugin/app discovery, not Claude app recommendations. |
| `Tool Definitions (full descriptions and parameter schemas) > search_mcp_registry` | adapted | `connectors-and-mcp.md` | Use `tool_search` and plugin install flow when available and appropriate. |
| `Tool Definitions (full descriptions and parameter schemas) > str_replace` | implemented | `fable-to-codex-map.md` | Use `apply_patch` for manual edits. |
| `Tool Definitions (full descriptions and parameter schemas) > suggest_connectors` | adapted | `connectors-and-mcp.md` | Suggest/install tools only through the active Codex plugin flow. |
| `Tool Definitions (full descriptions and parameter schemas) > view` | implemented | `fable-to-codex-map.md`, `artifact-and-tooling.md` | Use shell reads, image view, Browser, or connector readback. |
| `Tool Definitions (full descriptions and parameter schemas) > weather_fetch` | adapted | `currentness-safety.md` | Use weather/current-data tools or web sources when needed. |
| `Tool Definitions (full descriptions and parameter schemas) > web_fetch` | implemented | `currentness-safety.md` | Open exact URLs or use primary connectors. |
| `Tool Definitions (full descriptions and parameter schemas) > web_search` | implemented | `currentness-safety.md` | Use web search for unstable facts and explicit lookup requests. |
| `Identity Preamble` | not_applicable | `SKILL.md`, `fable-to-codex-map.md` | Do not claim Claude/Fable identity unless the active provider truly is that system. |
| `anthropic_api_in_artifacts ("Claudeception")` | adapted | `provider-bridge.md`, `artifact-and-tooling.md` | Use user-provided providers only; never assume hidden Anthropic credentials. |
| `citation_instructions` | implemented | `currentness-safety.md` | Provide Markdown links and concise source attribution. |
| `User Context` | implemented | `SKILL.md`, active environment context | Use only current user, workspace, and environment context. |
| `available_skills` | implemented | `SKILL.md` | Use the currently listed Codex skills and read bodies before applying them. |
| `network_configuration` | implemented | `SKILL.md`, active tool rules | Follow the active network and browsing instructions. |
| `filesystem_configuration` | implemented | `artifact-and-tooling.md`, active sandbox rules | Follow the active workspace, sandbox, `work/`, and `outputs/` rules. |

## Completion Target

A 100% score means every source heading is accounted for in this matrix and has an explicit Codex-native decision. It does not mean exact Claude/Fable behavior, hidden runtime parity, or Fable model capability. Those require the actual provider and runtime.