{
  "schema": "pi.ext.conformance-matrix.v1",
  "generated_at": "2026-05-12T19:32:10Z",
  "task": "bd-2kyq",
  "matrix": [
    {
      "category": "tool",
      "capability": "read",
      "required": true,
      "behaviors": [
        {
          "description": "Tool reads files via pi.tool(read/grep/find/ls)",
          "protocol_surface": "host_call(method=tool, name∈{read,grep,find,ls})",
          "pass_criteria": "Hostcall completes with correct file content; capability derived as read",
          "fail_criteria": "Hostcall denied, wrong capability derivation, or incorrect content"
        }
      ],
      "exemplar_extensions": [
        "antigravity-image-gen",
        "tool-override",
        "truncated-tool"
      ]
    },
    {
      "category": "tool",
      "capability": "write",
      "required": true,
      "behaviors": [
        {
          "description": "Tool writes/edits files via pi.tool(write/edit)",
          "protocol_surface": "host_call(method=tool, name∈{write,edit})",
          "pass_criteria": "Hostcall completes; file mutation applied correctly",
          "fail_criteria": "Hostcall denied or file not mutated"
        }
      ],
      "exemplar_extensions": [
        "antigravity-image-gen",
        "tool-override",
        "truncated-tool"
      ]
    },
    {
      "category": "tool",
      "capability": "exec",
      "required": true,
      "behaviors": [
        {
          "description": "Tool executes commands via pi.exec() or pi.tool(bash)",
          "protocol_surface": "host_call(method=exec) or host_call(method=tool, name=bash)",
          "pass_criteria": "Command runs, stdout/stderr/exitCode returned",
          "fail_criteria": "Execution denied, timeout without error, or wrong exit code"
        }
      ],
      "exemplar_extensions": [
        "antigravity-image-gen",
        "bash-spawn-hook",
        "shutdown-command",
        "truncated-tool"
      ]
    },
    {
      "category": "tool",
      "capability": "http",
      "required": true,
      "behaviors": [
        {
          "description": "Tool makes HTTP requests via pi.http()",
          "protocol_surface": "host_call(method=http)",
          "pass_criteria": "Request sent, response returned with status/body",
          "fail_criteria": "HTTP denied or malformed response"
        }
      ],
      "exemplar_extensions": [
        "antigravity-image-gen"
      ]
    },
    {
      "category": "tool",
      "capability": "log",
      "required": false,
      "behaviors": [
        {
          "description": "Extension load emits structured log",
          "protocol_surface": "pi.ext.log.v1",
          "pass_criteria": "Load event logged with correct extension_id and schema",
          "fail_criteria": "Missing load log or wrong extension_id"
        }
      ],
      "exemplar_extensions": []
    },
    {
      "category": "command",
      "capability": "exec",
      "required": false,
      "behaviors": [
        {
          "description": "Command executes shell commands",
          "protocol_surface": "host_call(method=exec)",
          "pass_criteria": "Execution succeeds with correct output",
          "fail_criteria": "Execution denied or wrong output"
        }
      ],
      "exemplar_extensions": []
    },
    {
      "category": "command",
      "capability": "session",
      "required": true,
      "behaviors": [
        {
          "description": "Command accesses session state via pi.session.*",
          "protocol_surface": "host_call(method=session)",
          "pass_criteria": "Session data read/written correctly",
          "fail_criteria": "Session call denied or data corrupted"
        }
      ],
      "exemplar_extensions": []
    },
    {
      "category": "command",
      "capability": "ui",
      "required": true,
      "behaviors": [
        {
          "description": "Slash command prompts user via pi.ui.*",
          "protocol_surface": "host_call(method=ui, op∈{select,input,confirm})",
          "pass_criteria": "UI prompt dispatched and response routed back to handler",
          "fail_criteria": "UI call denied in interactive mode or response lost"
        }
      ],
      "exemplar_extensions": []
    },
    {
      "category": "command",
      "capability": "log",
      "required": false,
      "behaviors": [
        {
          "description": "Extension load emits structured log",
          "protocol_surface": "pi.ext.log.v1",
          "pass_criteria": "Load event logged with correct extension_id and schema",
          "fail_criteria": "Missing load log or wrong extension_id"
        }
      ],
      "exemplar_extensions": []
    },
    {
      "category": "command",
      "capability": "tool",
      "required": false,
      "behaviors": [
        {
          "description": "Extension calls non-core tool via pi.tool()",
          "protocol_surface": "host_call(method=tool, name=<non-core>)",
          "pass_criteria": "Tool capability check applied; prompt/deny in strict mode",
          "fail_criteria": "Tool call bypasses capability check"
        }
      ],
      "exemplar_extensions": []
    },
    {
      "category": "provider",
      "capability": "read",
      "required": false,
      "behaviors": [
        {
          "description": "Provider reads local config files",
          "protocol_surface": "host_call(method=tool, name=read) or pi.fs.read",
          "pass_criteria": "Config file read succeeds",
          "fail_criteria": "Read denied or file not found"
        }
      ],
      "exemplar_extensions": [
        "custom-provider-gitlab-duo"
      ]
    },
    {
      "category": "provider",
      "capability": "http",
      "required": true,
      "behaviors": [
        {
          "description": "Provider streams LLM responses via pi.http()",
          "protocol_surface": "host_call(method=http) + streamSimple streaming",
          "pass_criteria": "HTTP request to LLM API succeeds; streaming chunks delivered",
          "fail_criteria": "HTTP denied, stream broken, or chunks lost"
        }
      ],
      "exemplar_extensions": [
        "custom-provider-anthropic",
        "custom-provider-gitlab-duo"
      ]
    },
    {
      "category": "provider",
      "capability": "log",
      "required": false,
      "behaviors": [
        {
          "description": "Extension load emits structured log",
          "protocol_surface": "pi.ext.log.v1",
          "pass_criteria": "Load event logged with correct extension_id and schema",
          "fail_criteria": "Missing load log or wrong extension_id"
        }
      ],
      "exemplar_extensions": []
    },
    {
      "category": "provider",
      "capability": "env",
      "required": true,
      "behaviors": [
        {
          "description": "Provider accesses API keys via process.env",
          "protocol_surface": "process.env access (capability=env)",
          "pass_criteria": "Environment variable accessible when env capability granted",
          "fail_criteria": "Env access denied when capability should be granted"
        }
      ],
      "exemplar_extensions": [
        "custom-provider-gitlab-duo"
      ]
    },
    {
      "category": "provider",
      "capability": "tool",
      "required": false,
      "behaviors": [
        {
          "description": "Extension calls non-core tool via pi.tool()",
          "protocol_surface": "host_call(method=tool, name=<non-core>)",
          "pass_criteria": "Tool capability check applied; prompt/deny in strict mode",
          "fail_criteria": "Tool call bypasses capability check"
        }
      ],
      "exemplar_extensions": []
    },
    {
      "category": "event_hook",
      "capability": "exec",
      "required": true,
      "behaviors": [
        {
          "description": "Event hook executes commands on events",
          "protocol_surface": "event_hook dispatch + host_call(method=exec)",
          "pass_criteria": "Command execution triggered by event",
          "fail_criteria": "Execution denied or event not dispatched"
        }
      ],
      "exemplar_extensions": [
        "git-checkpoint",
        "mac-system-theme"
      ]
    },
    {
      "category": "event_hook",
      "capability": "http",
      "required": false,
      "behaviors": [
        {
          "description": "Event hook makes HTTP requests on events",
          "protocol_surface": "event_hook dispatch + host_call(method=http)",
          "pass_criteria": "HTTP request sent when event fires",
          "fail_criteria": "HTTP denied or event not dispatched"
        }
      ],
      "exemplar_extensions": []
    },
    {
      "category": "event_hook",
      "capability": "session",
      "required": true,
      "behaviors": [
        {
          "description": "Event hook reads/modifies session on lifecycle events",
          "protocol_surface": "event_hook dispatch + host_call(method=session)",
          "pass_criteria": "Hook fires on correct event; session mutations applied",
          "fail_criteria": "Hook not fired, wrong event, or session mutation lost"
        }
      ],
      "exemplar_extensions": [
        "event-bus",
        "git-checkpoint",
        "tools"
      ]
    },
    {
      "category": "event_hook",
      "capability": "ui",
      "required": true,
      "behaviors": [
        {
          "description": "Event hook renders UI elements",
          "protocol_surface": "event_hook dispatch + host_call(method=ui)",
          "pass_criteria": "UI elements rendered after hook fires",
          "fail_criteria": "UI call fails or hook not dispatched"
        }
      ],
      "exemplar_extensions": [
        "claude-rules",
        "file-trigger",
        "git-checkpoint",
        "mac-system-theme",
        "modal-editor",
        "rainbow-editor",
        "rpc-demo",
        "status-line",
        "tools",
        "trigger-compact",
        "widget-placement"
      ]
    },
    {
      "category": "event_hook",
      "capability": "log",
      "required": false,
      "behaviors": [
        {
          "description": "Extension load emits structured log",
          "protocol_surface": "pi.ext.log.v1",
          "pass_criteria": "Load event logged with correct extension_id and schema",
          "fail_criteria": "Missing load log or wrong extension_id"
        }
      ],
      "exemplar_extensions": []
    },
    {
      "category": "event_hook",
      "capability": "tool",
      "required": false,
      "behaviors": [
        {
          "description": "Extension calls non-core tool via pi.tool()",
          "protocol_surface": "host_call(method=tool, name=<non-core>)",
          "pass_criteria": "Tool capability check applied; prompt/deny in strict mode",
          "fail_criteria": "Tool call bypasses capability check"
        }
      ],
      "exemplar_extensions": []
    },
    {
      "category": "ui_component",
      "capability": "ui",
      "required": true,
      "behaviors": [
        {
          "description": "UI component registers message renderer",
          "protocol_surface": "registerMessageRenderer in register payload",
          "pass_criteria": "Renderer registered and callable",
          "fail_criteria": "Renderer not found in registration snapshot"
        }
      ],
      "exemplar_extensions": [
        "custom-header",
        "doom-overlay",
        "overlay-qa-tests",
        "overlay-test",
        "snake",
        "space-invaders"
      ]
    },
    {
      "category": "ui_component",
      "capability": "log",
      "required": false,
      "behaviors": [
        {
          "description": "Extension load emits structured log",
          "protocol_surface": "pi.ext.log.v1",
          "pass_criteria": "Load event logged with correct extension_id and schema",
          "fail_criteria": "Missing load log or wrong extension_id"
        }
      ],
      "exemplar_extensions": []
    },
    {
      "category": "ui_component",
      "capability": "tool",
      "required": false,
      "behaviors": [
        {
          "description": "Extension calls non-core tool via pi.tool()",
          "protocol_surface": "host_call(method=tool, name=<non-core>)",
          "pass_criteria": "Tool capability check applied; prompt/deny in strict mode",
          "fail_criteria": "Tool call bypasses capability check"
        }
      ],
      "exemplar_extensions": []
    },
    {
      "category": "configuration",
      "capability": "session",
      "required": true,
      "behaviors": [
        {
          "description": "Flag modifies session configuration",
          "protocol_surface": "register(flags) + host_call(method=session)",
          "pass_criteria": "Flag value reflected in session state",
          "fail_criteria": "Session state not updated after flag set"
        }
      ],
      "exemplar_extensions": [
        "plan-mode",
        "preset"
      ]
    },
    {
      "category": "configuration",
      "capability": "ui",
      "required": true,
      "behaviors": [
        {
          "description": "Flag/shortcut activation triggers UI",
          "protocol_surface": "register(flags/shortcuts) + host_call(method=ui)",
          "pass_criteria": "Flag/shortcut registered; activation dispatches correctly",
          "fail_criteria": "Registration missing or activation fails"
        }
      ],
      "exemplar_extensions": [
        "plan-mode",
        "preset"
      ]
    },
    {
      "category": "configuration",
      "capability": "log",
      "required": false,
      "behaviors": [
        {
          "description": "Extension load emits structured log",
          "protocol_surface": "pi.ext.log.v1",
          "pass_criteria": "Load event logged with correct extension_id and schema",
          "fail_criteria": "Missing load log or wrong extension_id"
        }
      ],
      "exemplar_extensions": []
    },
    {
      "category": "configuration",
      "capability": "tool",
      "required": false,
      "behaviors": [
        {
          "description": "Extension calls non-core tool via pi.tool()",
          "protocol_surface": "host_call(method=tool, name=<non-core>)",
          "pass_criteria": "Tool capability check applied; prompt/deny in strict mode",
          "fail_criteria": "Tool call bypasses capability check"
        }
      ],
      "exemplar_extensions": []
    },
    {
      "category": "multi",
      "capability": "read",
      "required": true,
      "behaviors": [
        {
          "description": "Multi-type extension uses Read across registrations",
          "protocol_surface": "Multiple register types + host_call using Read",
          "pass_criteria": "All registration types load; capability dispatched correctly",
          "fail_criteria": "Any registration type fails or capability mismatch"
        }
      ],
      "exemplar_extensions": [
        "sandbox",
        "ssh",
        "subagent"
      ]
    },
    {
      "category": "multi",
      "capability": "write",
      "required": true,
      "behaviors": [
        {
          "description": "Multi-type extension uses Write across registrations",
          "protocol_surface": "Multiple register types + host_call using Write",
          "pass_criteria": "All registration types load; capability dispatched correctly",
          "fail_criteria": "Any registration type fails or capability mismatch"
        }
      ],
      "exemplar_extensions": [
        "ssh",
        "subagent"
      ]
    },
    {
      "category": "multi",
      "capability": "exec",
      "required": true,
      "behaviors": [
        {
          "description": "Multi-type extension uses Exec across registrations",
          "protocol_surface": "Multiple register types + host_call using Exec",
          "pass_criteria": "All registration types load; capability dispatched correctly",
          "fail_criteria": "Any registration type fails or capability mismatch"
        }
      ],
      "exemplar_extensions": [
        "sandbox",
        "ssh",
        "subagent"
      ]
    },
    {
      "category": "multi",
      "capability": "http",
      "required": true,
      "behaviors": [
        {
          "description": "Multi-type extension uses Http across registrations",
          "protocol_surface": "Multiple register types + host_call using Http",
          "pass_criteria": "All registration types load; capability dispatched correctly",
          "fail_criteria": "Any registration type fails or capability mismatch"
        }
      ],
      "exemplar_extensions": [
        "custom-provider-qwen-cli"
      ]
    },
    {
      "category": "multi",
      "capability": "session",
      "required": true,
      "behaviors": [
        {
          "description": "Multi-type extension uses Session across registrations",
          "protocol_surface": "Multiple register types + host_call using Session",
          "pass_criteria": "All registration types load; capability dispatched correctly",
          "fail_criteria": "Any registration type fails or capability mismatch"
        }
      ],
      "exemplar_extensions": []
    },
    {
      "category": "multi",
      "capability": "ui",
      "required": true,
      "behaviors": [
        {
          "description": "Multi-type extension uses Ui across registrations",
          "protocol_surface": "Multiple register types + host_call using Ui",
          "pass_criteria": "All registration types load; capability dispatched correctly",
          "fail_criteria": "Any registration type fails or capability mismatch"
        }
      ],
      "exemplar_extensions": [
        "sandbox",
        "ssh",
        "subagent"
      ]
    },
    {
      "category": "multi",
      "capability": "log",
      "required": true,
      "behaviors": [
        {
          "description": "Extension load emits structured log",
          "protocol_surface": "pi.ext.log.v1",
          "pass_criteria": "Load event logged with correct extension_id and schema",
          "fail_criteria": "Missing load log or wrong extension_id"
        }
      ],
      "exemplar_extensions": []
    },
    {
      "category": "multi",
      "capability": "env",
      "required": true,
      "behaviors": [
        {
          "description": "Multi-type extension uses Env across registrations",
          "protocol_surface": "Multiple register types + host_call using Env",
          "pass_criteria": "All registration types load; capability dispatched correctly",
          "fail_criteria": "Any registration type fails or capability mismatch"
        }
      ],
      "exemplar_extensions": [
        "sandbox",
        "subagent"
      ]
    },
    {
      "category": "multi",
      "capability": "tool",
      "required": true,
      "behaviors": [
        {
          "description": "Multi-type extension uses Tool across registrations",
          "protocol_surface": "Multiple register types + host_call using Tool",
          "pass_criteria": "All registration types load; capability dispatched correctly",
          "fail_criteria": "Any registration type fails or capability mismatch"
        },
        {
          "description": "Extension calls non-core tool via pi.tool()",
          "protocol_surface": "host_call(method=tool, name=<non-core>)",
          "pass_criteria": "Tool capability check applied; prompt/deny in strict mode",
          "fail_criteria": "Tool call bypasses capability check"
        }
      ],
      "exemplar_extensions": []
    },
    {
      "category": "general",
      "capability": "session",
      "required": true,
      "behaviors": [
        {
          "description": "General extension uses Session via export default",
          "protocol_surface": "export default + host_call(method=Session)",
          "pass_criteria": "Extension loads; hostcall dispatched and returns",
          "fail_criteria": "Load failure or hostcall error"
        }
      ],
      "exemplar_extensions": [
        "auto-commit-on-exit",
        "bookmark",
        "confirm-destructive",
        "custom-compaction",
        "custom-footer",
        "handoff",
        "qna",
        "session-name",
        "summarize",
        "titlebar-spinner"
      ]
    },
    {
      "category": "general",
      "capability": "ui",
      "required": true,
      "behaviors": [
        {
          "description": "General extension uses Ui via export default",
          "protocol_surface": "export default + host_call(method=Ui)",
          "pass_criteria": "Extension loads; hostcall dispatched and returns",
          "fail_criteria": "Load failure or hostcall error"
        }
      ],
      "exemplar_extensions": [
        "auto-commit-on-exit",
        "bookmark",
        "confirm-destructive",
        "custom-compaction",
        "custom-footer",
        "dirty-repo-guard",
        "handoff",
        "inline-bash",
        "input-transform",
        "interactive-shell",
        "model-status",
        "permission-gate",
        "pirate",
        "protected-paths",
        "qna",
        "send-user-message",
        "session-name",
        "summarize",
        "system-prompt-header",
        "timed-confirm",
        "titlebar-spinner"
      ]
    },
    {
      "category": "general",
      "capability": "log",
      "required": false,
      "behaviors": [
        {
          "description": "Extension load emits structured log",
          "protocol_surface": "pi.ext.log.v1",
          "pass_criteria": "Load event logged with correct extension_id and schema",
          "fail_criteria": "Missing load log or wrong extension_id"
        }
      ],
      "exemplar_extensions": []
    },
    {
      "category": "general",
      "capability": "tool",
      "required": false,
      "behaviors": [
        {
          "description": "Extension calls non-core tool via pi.tool()",
          "protocol_surface": "host_call(method=tool, name=<non-core>)",
          "pass_criteria": "Tool capability check applied; prompt/deny in strict mode",
          "fail_criteria": "Tool call bypasses capability check"
        }
      ],
      "exemplar_extensions": []
    }
  ],
  "fixture_assignments": [
    {
      "cell_key": "Tool:Read",
      "fixture_extensions": [
        "antigravity-image-gen",
        "tool-override",
        "truncated-tool"
      ],
      "min_fixtures": 2,
      "coverage_met": true
    },
    {
      "cell_key": "Tool:Write",
      "fixture_extensions": [
        "antigravity-image-gen",
        "tool-override",
        "truncated-tool"
      ],
      "min_fixtures": 2,
      "coverage_met": true
    },
    {
      "cell_key": "Tool:Exec",
      "fixture_extensions": [
        "antigravity-image-gen",
        "bash-spawn-hook",
        "shutdown-command",
        "truncated-tool"
      ],
      "min_fixtures": 2,
      "coverage_met": true
    },
    {
      "cell_key": "Tool:Http",
      "fixture_extensions": [
        "antigravity-image-gen"
      ],
      "min_fixtures": 2,
      "coverage_met": false
    },
    {
      "cell_key": "Tool:Log",
      "fixture_extensions": [],
      "min_fixtures": 1,
      "coverage_met": false
    },
    {
      "cell_key": "Command:Exec",
      "fixture_extensions": [],
      "min_fixtures": 1,
      "coverage_met": false
    },
    {
      "cell_key": "Command:Session",
      "fixture_extensions": [],
      "min_fixtures": 2,
      "coverage_met": false
    },
    {
      "cell_key": "Command:Ui",
      "fixture_extensions": [],
      "min_fixtures": 2,
      "coverage_met": false
    },
    {
      "cell_key": "Command:Log",
      "fixture_extensions": [],
      "min_fixtures": 1,
      "coverage_met": false
    },
    {
      "cell_key": "Command:Tool",
      "fixture_extensions": [],
      "min_fixtures": 1,
      "coverage_met": false
    },
    {
      "cell_key": "Provider:Read",
      "fixture_extensions": [
        "custom-provider-gitlab-duo"
      ],
      "min_fixtures": 1,
      "coverage_met": true
    },
    {
      "cell_key": "Provider:Http",
      "fixture_extensions": [
        "custom-provider-anthropic",
        "custom-provider-gitlab-duo"
      ],
      "min_fixtures": 2,
      "coverage_met": true
    },
    {
      "cell_key": "Provider:Log",
      "fixture_extensions": [],
      "min_fixtures": 1,
      "coverage_met": false
    },
    {
      "cell_key": "Provider:Env",
      "fixture_extensions": [
        "custom-provider-gitlab-duo"
      ],
      "min_fixtures": 2,
      "coverage_met": false
    },
    {
      "cell_key": "Provider:Tool",
      "fixture_extensions": [],
      "min_fixtures": 1,
      "coverage_met": false
    },
    {
      "cell_key": "EventHook:Exec",
      "fixture_extensions": [
        "git-checkpoint",
        "mac-system-theme"
      ],
      "min_fixtures": 2,
      "coverage_met": true
    },
    {
      "cell_key": "EventHook:Http",
      "fixture_extensions": [],
      "min_fixtures": 1,
      "coverage_met": false
    },
    {
      "cell_key": "EventHook:Session",
      "fixture_extensions": [
        "event-bus",
        "git-checkpoint",
        "tools"
      ],
      "min_fixtures": 2,
      "coverage_met": true
    },
    {
      "cell_key": "EventHook:Ui",
      "fixture_extensions": [
        "claude-rules",
        "file-trigger",
        "git-checkpoint",
        "mac-system-theme",
        "modal-editor",
        "rainbow-editor",
        "rpc-demo",
        "status-line",
        "tools",
        "trigger-compact",
        "widget-placement"
      ],
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}