-- Sessions table
CREATE TABLE IF NOT EXISTS sessions (
    id          TEXT PRIMARY KEY,
    project     TEXT NOT NULL,
    machine     TEXT NOT NULL DEFAULT 'local',
    agent       TEXT NOT NULL DEFAULT 'claude',
    first_message TEXT,
    display_name TEXT,
    session_name TEXT,
    started_at  TEXT,
    ended_at    TEXT,
    message_count INTEGER NOT NULL DEFAULT 0,
    user_message_count INTEGER NOT NULL DEFAULT 0,
    file_path   TEXT,
    file_size   INTEGER,
    file_mtime  INTEGER,
    next_ordinal INTEGER NOT NULL DEFAULT 0,
    last_entry_uuid TEXT,
    file_inode  INTEGER,
    file_device INTEGER,
    file_hash   TEXT,
    local_modified_at TEXT,
    transcript_revision TEXT NOT NULL DEFAULT '0',
    parent_session_id TEXT,
    relationship_type TEXT NOT NULL DEFAULT '',
    total_output_tokens INTEGER NOT NULL DEFAULT 0,
    peak_context_tokens INTEGER NOT NULL DEFAULT 0,
    has_total_output_tokens INTEGER NOT NULL DEFAULT 0,
    has_peak_context_tokens INTEGER NOT NULL DEFAULT 0,
    is_automated INTEGER NOT NULL DEFAULT 0,
    tool_failure_signal_count INTEGER NOT NULL DEFAULT 0,
    tool_retry_count INTEGER NOT NULL DEFAULT 0,
    edit_churn_count INTEGER NOT NULL DEFAULT 0,
    consecutive_failure_max INTEGER NOT NULL DEFAULT 0,
    outcome TEXT NOT NULL DEFAULT 'unknown',
    outcome_confidence TEXT NOT NULL DEFAULT 'low',
    ended_with_role TEXT NOT NULL DEFAULT '',
    final_failure_streak INTEGER NOT NULL DEFAULT 0,
    signals_pending_since TEXT,
    compaction_count INTEGER NOT NULL DEFAULT 0,
    mid_task_compaction_count INTEGER NOT NULL DEFAULT 0,
    context_pressure_max REAL,
    health_score INTEGER,
    health_grade TEXT,
    has_tool_calls INTEGER NOT NULL DEFAULT 0,
    has_context_data INTEGER NOT NULL DEFAULT 0,
    quality_signal_version INTEGER NOT NULL DEFAULT 0,
    short_prompt_count INTEGER NOT NULL DEFAULT 0,
    unstructured_start INTEGER NOT NULL DEFAULT 0,
    missing_success_criteria_count INTEGER NOT NULL DEFAULT 0,
    missing_verification_count INTEGER NOT NULL DEFAULT 0,
    duplicate_prompt_count INTEGER NOT NULL DEFAULT 0,
    no_code_context_count INTEGER NOT NULL DEFAULT 0,
    runaway_tool_loop_count INTEGER NOT NULL DEFAULT 0,
    data_version INTEGER NOT NULL DEFAULT 0,
    cwd TEXT NOT NULL DEFAULT '',
    git_branch TEXT NOT NULL DEFAULT '',
    source_session_id TEXT NOT NULL DEFAULT '',
    source_version TEXT NOT NULL DEFAULT '',
    transcript_fidelity TEXT NOT NULL DEFAULT '',
    parser_malformed_lines INTEGER NOT NULL DEFAULT 0,
    is_truncated INTEGER NOT NULL DEFAULT 0,
    -- SQLite-only sync bookkeeping (like next_ordinal): TRUE when the
    -- last write to this row went through the incremental-append path
    -- rather than a full re-normalization. Consumed only by parse-diff
    -- to suppress benign incremental-vs-full skew; deliberately not
    -- mirrored to PG/DuckDB.
    last_write_incremental INTEGER NOT NULL DEFAULT 0,
    deleted_at  TEXT,
    created_at  TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ','now')),
    termination_status TEXT,
    secret_leak_count INTEGER NOT NULL DEFAULT 0,
    secrets_rules_version TEXT NOT NULL DEFAULT ''
);

-- Messages table with ordinal for efficient range queries
CREATE TABLE IF NOT EXISTS messages (
    id             INTEGER PRIMARY KEY,
    session_id     TEXT NOT NULL REFERENCES sessions(id) ON DELETE CASCADE,
    ordinal        INTEGER NOT NULL,
    role           TEXT NOT NULL,
    content        TEXT NOT NULL,
    thinking_text  TEXT NOT NULL DEFAULT '',
    timestamp      TEXT,
    has_thinking   INTEGER NOT NULL DEFAULT 0,
    has_tool_use   INTEGER NOT NULL DEFAULT 0,
    content_length INTEGER NOT NULL DEFAULT 0,
    is_system      INTEGER NOT NULL DEFAULT 0,
    model TEXT NOT NULL DEFAULT '',
    token_usage TEXT NOT NULL DEFAULT '',
    context_tokens INTEGER NOT NULL DEFAULT 0,
    output_tokens INTEGER NOT NULL DEFAULT 0,
    has_context_tokens INTEGER NOT NULL DEFAULT 0,
    has_output_tokens INTEGER NOT NULL DEFAULT 0,
    claude_message_id TEXT NOT NULL DEFAULT '',
    claude_request_id TEXT NOT NULL DEFAULT '',
    source_type TEXT NOT NULL DEFAULT '',
    source_subtype TEXT NOT NULL DEFAULT '',
    source_uuid TEXT NOT NULL DEFAULT '',
    source_parent_uuid TEXT NOT NULL DEFAULT '',
    is_sidechain INTEGER NOT NULL DEFAULT 0,
    is_compact_boundary INTEGER NOT NULL DEFAULT 0,
    UNIQUE(session_id, ordinal)
);

-- Stats table maintained by triggers
CREATE TABLE IF NOT EXISTS stats (
    key   TEXT PRIMARY KEY,
    value INTEGER NOT NULL DEFAULT 0
);

INSERT OR IGNORE INTO stats (key, value) VALUES ('session_count', 0);
INSERT OR IGNORE INTO stats (key, value) VALUES ('message_count', 0);

-- Triggers for stats maintenance
CREATE TRIGGER IF NOT EXISTS sessions_insert_stats AFTER INSERT ON sessions BEGIN
    UPDATE stats SET value = value + 1 WHERE key = 'session_count';
END;

CREATE TRIGGER IF NOT EXISTS sessions_delete_stats AFTER DELETE ON sessions BEGIN
    UPDATE stats SET value = value - 1 WHERE key = 'session_count';
END;

CREATE TRIGGER IF NOT EXISTS messages_insert_stats AFTER INSERT ON messages BEGIN
    UPDATE stats SET value = value + 1 WHERE key = 'message_count';
END;

CREATE TRIGGER IF NOT EXISTS messages_delete_stats AFTER DELETE ON messages BEGIN
    UPDATE stats SET value = value - 1 WHERE key = 'message_count';
END;

-- Indexes
CREATE INDEX IF NOT EXISTS idx_sessions_ended
    ON sessions(ended_at DESC, id);
CREATE INDEX IF NOT EXISTS idx_sessions_project
    ON sessions(project);
CREATE INDEX IF NOT EXISTS idx_sessions_machine
    ON sessions(machine);
CREATE INDEX IF NOT EXISTS idx_messages_session_ordinal
    ON messages(session_id, ordinal);
CREATE INDEX IF NOT EXISTS idx_messages_velocity
    ON messages(session_id, ordinal, role, timestamp, content_length);
CREATE INDEX IF NOT EXISTS idx_messages_session_role
    ON messages(session_id, role);

CREATE INDEX IF NOT EXISTS idx_sessions_parent
    ON sessions(parent_session_id)
    WHERE parent_session_id IS NOT NULL;

CREATE INDEX IF NOT EXISTS idx_sessions_file_path
    ON sessions(file_path)
    WHERE file_path IS NOT NULL;

-- Analytics indexes
CREATE INDEX IF NOT EXISTS idx_sessions_started
    ON sessions(started_at);
CREATE INDEX IF NOT EXISTS idx_sessions_message_count
    ON sessions(message_count);
CREATE INDEX IF NOT EXISTS idx_sessions_user_message_count
    ON sessions(user_message_count);
CREATE INDEX IF NOT EXISTS idx_sessions_agent
    ON sessions(agent);

-- Session-level usage events. These complement message-level
-- messages.token_usage rows for agents that only expose aggregate
-- session accounting.
CREATE TABLE IF NOT EXISTS usage_events (
    id INTEGER PRIMARY KEY,
    session_id TEXT NOT NULL REFERENCES sessions(id) ON DELETE CASCADE,
    message_ordinal INTEGER,
    source TEXT NOT NULL,
    model TEXT NOT NULL,
    input_tokens INTEGER NOT NULL DEFAULT 0,
    output_tokens INTEGER NOT NULL DEFAULT 0,
    cache_creation_input_tokens INTEGER NOT NULL DEFAULT 0,
    cache_read_input_tokens INTEGER NOT NULL DEFAULT 0,
    reasoning_tokens INTEGER NOT NULL DEFAULT 0,
    cost_usd REAL,
    cost_status TEXT NOT NULL DEFAULT '',
    cost_source TEXT NOT NULL DEFAULT '',
    occurred_at TEXT,
    dedup_key TEXT NOT NULL DEFAULT ''
);

CREATE UNIQUE INDEX IF NOT EXISTS idx_usage_events_dedup
    ON usage_events(session_id, source, dedup_key)
    WHERE dedup_key != '';
CREATE INDEX IF NOT EXISTS idx_usage_events_session
    ON usage_events(session_id);
CREATE INDEX IF NOT EXISTS idx_usage_events_occurred
    ON usage_events(occurred_at);

CREATE TABLE IF NOT EXISTS cursor_usage_events (
    id INTEGER PRIMARY KEY,
    occurred_at TEXT NOT NULL,
    model TEXT NOT NULL,
    kind TEXT NOT NULL DEFAULT '',
    input_tokens INTEGER NOT NULL DEFAULT 0,
    output_tokens INTEGER NOT NULL DEFAULT 0,
    cache_write_tokens INTEGER NOT NULL DEFAULT 0,
    cache_read_tokens INTEGER NOT NULL DEFAULT 0,
    charged_cents REAL NOT NULL DEFAULT 0,
    cursor_token_fee REAL NOT NULL DEFAULT 0,
    user_id TEXT NOT NULL DEFAULT '',
    user_email TEXT NOT NULL DEFAULT '',
    is_headless INTEGER NOT NULL DEFAULT 0,
    dedup_key TEXT NOT NULL DEFAULT ''
);

CREATE UNIQUE INDEX IF NOT EXISTS idx_cursor_usage_events_dedup
    ON cursor_usage_events(dedup_key)
    WHERE dedup_key != '';
CREATE INDEX IF NOT EXISTS idx_cursor_usage_events_occurred
    ON cursor_usage_events(occurred_at);
CREATE INDEX IF NOT EXISTS idx_cursor_usage_events_model
    ON cursor_usage_events(model);

-- Tool calls table
CREATE TABLE IF NOT EXISTS tool_calls (
    id         INTEGER PRIMARY KEY,
    message_id INTEGER NOT NULL
        REFERENCES messages(id) ON DELETE CASCADE,
    session_id TEXT NOT NULL
        REFERENCES sessions(id) ON DELETE CASCADE,
    tool_name  TEXT NOT NULL,
    category   TEXT NOT NULL,
    tool_use_id TEXT,
    input_json  TEXT,
    skill_name  TEXT,
    result_content_length INTEGER,
    result_content        TEXT,
    subagent_session_id TEXT,
    file_path  TEXT,
    call_index INTEGER
);

CREATE INDEX IF NOT EXISTS idx_tool_calls_session
    ON tool_calls(session_id);
CREATE INDEX IF NOT EXISTS idx_tool_calls_session_category
    ON tool_calls(session_id, category);
-- idx_tool_calls_message backs the ON DELETE CASCADE from
-- messages(id). Without it SQLite full-scans tool_calls per
-- deleted message row, which makes ReplaceSessionMessages
-- O(messages * tool_calls) and stalls sync once tool_calls
-- grows large.
CREATE INDEX IF NOT EXISTS idx_tool_calls_message
    ON tool_calls(message_id);
CREATE INDEX IF NOT EXISTS idx_tool_calls_category
    ON tool_calls(category);
CREATE INDEX IF NOT EXISTS idx_tool_calls_skill
    ON tool_calls(skill_name)
    WHERE skill_name IS NOT NULL;
CREATE INDEX IF NOT EXISTS idx_tool_calls_subagent
    ON tool_calls(subagent_session_id)
    WHERE subagent_session_id IS NOT NULL;

-- Tool result events table: canonical chronological tool outputs.
CREATE TABLE IF NOT EXISTS tool_result_events (
    id                       INTEGER PRIMARY KEY,
    session_id               TEXT NOT NULL
        REFERENCES sessions(id) ON DELETE CASCADE,
    tool_call_message_ordinal INTEGER NOT NULL,
    call_index               INTEGER NOT NULL DEFAULT 0,
    tool_use_id              TEXT,
    agent_id                 TEXT,
    subagent_session_id      TEXT,
    source                   TEXT NOT NULL,
    status                   TEXT NOT NULL,
    content                  TEXT NOT NULL,
    content_length           INTEGER NOT NULL DEFAULT 0,
    timestamp                TEXT,
    event_index              INTEGER NOT NULL DEFAULT 0
);

CREATE INDEX IF NOT EXISTS idx_tool_result_events_session
    ON tool_result_events(session_id);
CREATE INDEX IF NOT EXISTS idx_tool_result_events_call
    ON tool_result_events(
        session_id,
        tool_call_message_ordinal,
        call_index,
        event_index
    );

-- Insights table for AI-generated activity insights
CREATE TABLE IF NOT EXISTS insights (
    id          INTEGER PRIMARY KEY,
    type        TEXT NOT NULL,
    date_from   TEXT NOT NULL,
    date_to     TEXT NOT NULL,
    project     TEXT,
    agent       TEXT NOT NULL,
    model       TEXT,
    prompt      TEXT,
    content     TEXT NOT NULL,
    kind        TEXT NOT NULL DEFAULT '',
    schema_version TEXT NOT NULL DEFAULT '',
    template_id TEXT NOT NULL DEFAULT '',
    template_version TEXT NOT NULL DEFAULT '',
    aggregate_hash TEXT NOT NULL DEFAULT '',
    cache_key   TEXT NOT NULL DEFAULT '',
    cache_status TEXT NOT NULL DEFAULT '',
    provenance_json TEXT NOT NULL DEFAULT '',
    structured_json TEXT NOT NULL DEFAULT '',
    created_at  TEXT NOT NULL
        DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ','now'))
);

CREATE INDEX IF NOT EXISTS idx_insights_lookup
    ON insights(type, date_from, date_to, project);

CREATE INDEX IF NOT EXISTS idx_insights_created
    ON insights(created_at DESC);

-- Recall entries: reviewed, reusable facts learned from prior sessions.
-- These are not raw transcript chunks: each row is an accepted recall entry with
-- provenance back to the session archive.
CREATE TABLE IF NOT EXISTS recall_entries (
    id                TEXT PRIMARY KEY,
    type              TEXT NOT NULL,
    scope             TEXT NOT NULL,
    status            TEXT NOT NULL DEFAULT 'accepted',
    review_state      TEXT NOT NULL DEFAULT 'unreviewed_auto'
        CHECK (review_state IN (
            'human_reviewed', 'unreviewed_auto', 'calibrated_auto', 'eval_raw'
        )),
    title             TEXT NOT NULL,
    body              TEXT NOT NULL,
    trigger           TEXT NOT NULL DEFAULT '',
    confidence        REAL,
    uncertainty       TEXT NOT NULL DEFAULT '',
    project           TEXT NOT NULL DEFAULT '',
    cwd               TEXT NOT NULL DEFAULT '',
    git_branch        TEXT NOT NULL DEFAULT '',
    agent             TEXT NOT NULL DEFAULT '',
    source_session_id TEXT NOT NULL REFERENCES sessions(id) ON DELETE CASCADE,
    source_episode_id TEXT NOT NULL DEFAULT '',
    source_run_id     TEXT NOT NULL DEFAULT '',
    extractor_method  TEXT NOT NULL DEFAULT '',
    model             TEXT NOT NULL DEFAULT '',
    transferable      INTEGER NOT NULL DEFAULT 0,
    provenance_ok     INTEGER NOT NULL DEFAULT 0,
    supersedes_entry_id TEXT NOT NULL DEFAULT '',
    superseded_by_entry_id TEXT NOT NULL DEFAULT '',
    created_at        TEXT NOT NULL
        DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ','now')),
    updated_at        TEXT NOT NULL
        DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ','now'))
);

CREATE INDEX IF NOT EXISTS idx_recall_entries_context
    ON recall_entries(project, cwd, git_branch, agent);
CREATE INDEX IF NOT EXISTS idx_recall_entries_type_scope
    ON recall_entries(type, scope, status);
CREATE INDEX IF NOT EXISTS idx_recall_entries_source_session
    ON recall_entries(source_session_id);
CREATE INDEX IF NOT EXISTS idx_recall_entries_source_episode
    ON recall_entries(source_episode_id);
CREATE INDEX IF NOT EXISTS idx_recall_entries_updated
    ON recall_entries(updated_at DESC, id);
CREATE INDEX IF NOT EXISTS idx_recall_entries_supersession
    ON recall_entries(supersedes_entry_id, superseded_by_entry_id);

CREATE TABLE IF NOT EXISTS recall_evidence (
    id                    INTEGER PRIMARY KEY,
    entry_id             TEXT NOT NULL
        REFERENCES recall_entries(id) ON DELETE CASCADE,
    session_id            TEXT NOT NULL
        REFERENCES sessions(id) ON DELETE CASCADE,
    message_start_ordinal INTEGER NOT NULL,
    message_end_ordinal   INTEGER NOT NULL,
    message_start_source_uuid TEXT NOT NULL DEFAULT '',
    message_end_source_uuid   TEXT NOT NULL DEFAULT '',
    content_digest            TEXT NOT NULL DEFAULT '',
    tool_use_id           TEXT NOT NULL DEFAULT '',
    snippet               TEXT NOT NULL DEFAULT ''
);

CREATE INDEX IF NOT EXISTS idx_recall_evidence_entry
    ON recall_evidence(entry_id);
CREATE INDEX IF NOT EXISTS idx_recall_evidence_session
    ON recall_evidence(session_id);

-- Append-only demand and exposure snapshots. Exposures deliberately do not
-- reference recall_entries: measurements must survive recall/session deletion
-- and full resync even when an exposed entry no longer exists.
CREATE TABLE IF NOT EXISTS recall_query_events (
    id                   TEXT PRIMARY KEY,
    query_text           TEXT NOT NULL,
    surface              TEXT NOT NULL,
    filters_json         TEXT NOT NULL DEFAULT '{}',
    trusted_only         INTEGER NOT NULL DEFAULT 0,
    score_policy_version TEXT NOT NULL,
    result_count         INTEGER NOT NULL DEFAULT 0 CHECK (result_count >= 0),
    packed_count         INTEGER NOT NULL DEFAULT 0 CHECK (packed_count >= 0),
    top_score            REAL NOT NULL DEFAULT 0,
    miss_reason          TEXT NOT NULL DEFAULT '',
    created_at           TEXT NOT NULL
        DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ','now'))
);

CREATE INDEX IF NOT EXISTS idx_recall_query_events_created
    ON recall_query_events(created_at DESC, id);
CREATE INDEX IF NOT EXISTS idx_recall_query_events_surface
    ON recall_query_events(surface, created_at DESC);

CREATE TABLE IF NOT EXISTS recall_query_exposures (
    query_id TEXT NOT NULL
        REFERENCES recall_query_events(id) ON DELETE CASCADE,
    rank     INTEGER NOT NULL CHECK (rank >= 1),
    entry_id TEXT NOT NULL,
    score    REAL NOT NULL,
    packed   INTEGER NOT NULL DEFAULT 0 CHECK (packed IN (0, 1)),
    PRIMARY KEY (query_id, rank)
);

CREATE INDEX IF NOT EXISTS idx_recall_query_exposures_entry
    ON recall_query_exposures(entry_id);

-- Pinned messages table
CREATE TABLE IF NOT EXISTS pinned_messages (
    id          INTEGER PRIMARY KEY,
    session_id  TEXT NOT NULL REFERENCES sessions(id) ON DELETE CASCADE,
    message_id  INTEGER NOT NULL REFERENCES messages(id) ON DELETE CASCADE,
    ordinal     INTEGER NOT NULL,
    note        TEXT,
    created_at  TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ','now')),
    UNIQUE(session_id, message_id)
);

CREATE INDEX IF NOT EXISTS idx_pinned_session
    ON pinned_messages(session_id);
-- idx_pinned_message backs the ON DELETE CASCADE from messages(id).
-- The UNIQUE(session_id, message_id) constraint creates an index
-- ordered (session_id, message_id), which the FK lookup on
-- message_id alone cannot use (leftmost-prefix rule).
CREATE INDEX IF NOT EXISTS idx_pinned_message
    ON pinned_messages(message_id);
CREATE INDEX IF NOT EXISTS idx_pinned_created
    ON pinned_messages(created_at DESC);

-- Starred sessions: persists user star/unstar decisions
CREATE TABLE IF NOT EXISTS starred_sessions (
    session_id TEXT PRIMARY KEY REFERENCES sessions(id) ON DELETE CASCADE,
    created_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ','now'))
);

-- Excluded sessions: tracks session IDs that were permanently
-- deleted by the user so the sync engine does not re-import them.
CREATE TABLE IF NOT EXISTS excluded_sessions (
    id         TEXT PRIMARY KEY,
    created_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ','now'))
);
-- Skipped files cache: persists skip decisions for files that
-- produced no session (non-interactive, parse errors) so they
-- survive process restarts without re-parsing.
CREATE TABLE IF NOT EXISTS skipped_files (
    file_path  TEXT PRIMARY KEY,
    file_mtime INTEGER NOT NULL
);

-- Remote skip cache: tracks file mtimes per remote host
-- for SSH sync incremental optimization.
CREATE TABLE IF NOT EXISTS remote_skipped_files (
    host       TEXT NOT NULL,
    path       TEXT NOT NULL,
    file_mtime INTEGER NOT NULL,
    PRIMARY KEY (host, path)
);

CREATE TABLE IF NOT EXISTS worktree_project_mappings (
    id          INTEGER PRIMARY KEY,
    machine     TEXT NOT NULL,
    path_prefix TEXT NOT NULL,
    layout      TEXT NOT NULL DEFAULT 'explicit',
    project     TEXT NOT NULL,
    enabled     INTEGER NOT NULL DEFAULT 1,
    created_at  TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ','now')),
    updated_at  TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ','now')),
    UNIQUE(machine, path_prefix)
);

CREATE INDEX IF NOT EXISTS idx_worktree_project_mappings_match
    ON worktree_project_mappings(machine, enabled, path_prefix);

CREATE INDEX IF NOT EXISTS idx_worktree_project_mappings_project
    ON worktree_project_mappings(machine, project);

CREATE TABLE IF NOT EXISTS archive_metadata (
    key        TEXT PRIMARY KEY,
    value      TEXT NOT NULL,
    created_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ','now')),
    updated_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ','now'))
);

CREATE TABLE IF NOT EXISTS project_identity_observations (
    session_id         TEXT NOT NULL DEFAULT '',
    source_archive_id   TEXT NOT NULL DEFAULT '',
    source_archive_salt TEXT NOT NULL DEFAULT '',
    project            TEXT NOT NULL,
    machine            TEXT NOT NULL,
    root_path          TEXT NOT NULL DEFAULT '',
    git_remote         TEXT NOT NULL DEFAULT '',
    git_remote_name    TEXT NOT NULL DEFAULT '',
    repository_path    TEXT NOT NULL DEFAULT '',
    worktree_name      TEXT NOT NULL DEFAULT '',
    worktree_root_path TEXT NOT NULL DEFAULT '',
    worktree_relationship TEXT NOT NULL DEFAULT 'unknown',
    checkout_state     TEXT NOT NULL DEFAULT 'unknown',
    git_branch         TEXT NOT NULL DEFAULT '',
    remote_resolution  TEXT NOT NULL DEFAULT 'unknown',
    remote_candidate_count INTEGER NOT NULL DEFAULT 0,
    observed_at        TEXT NOT NULL,
    normalized_remote  TEXT NOT NULL DEFAULT '',
    key_source         TEXT NOT NULL DEFAULT '',
    key                TEXT NOT NULL DEFAULT '',
    PRIMARY KEY (project, machine, root_path, git_remote)
);

CREATE INDEX IF NOT EXISTS idx_project_identity_observations_project
    ON project_identity_observations(project);

CREATE TABLE IF NOT EXISTS session_project_identity_snapshots (
    session_id         TEXT PRIMARY KEY,
    project            TEXT NOT NULL,
    machine            TEXT NOT NULL,
    root_path          TEXT NOT NULL DEFAULT '',
    git_remote         TEXT NOT NULL DEFAULT '',
    git_remote_name    TEXT NOT NULL DEFAULT '',
    repository_path    TEXT NOT NULL DEFAULT '',
    worktree_name      TEXT NOT NULL DEFAULT '',
    worktree_root_path TEXT NOT NULL DEFAULT '',
    worktree_relationship TEXT NOT NULL DEFAULT 'unknown',
    checkout_state     TEXT NOT NULL DEFAULT 'unknown',
    git_branch         TEXT NOT NULL DEFAULT '',
    remote_resolution  TEXT NOT NULL DEFAULT 'unknown',
    remote_candidate_count INTEGER NOT NULL DEFAULT 0,
    observed_at        TEXT NOT NULL,
    normalized_remote  TEXT NOT NULL DEFAULT '',
    key_source         TEXT NOT NULL DEFAULT '',
    key                TEXT NOT NULL DEFAULT '',
    FOREIGN KEY (session_id) REFERENCES sessions(id) ON DELETE CASCADE
);

CREATE TABLE IF NOT EXISTS background_migrations (
    name            TEXT PRIMARY KEY,
    state           TEXT NOT NULL,
    total_items     INTEGER NOT NULL DEFAULT 0,
    completed_items INTEGER NOT NULL DEFAULT 0,
    last_error      TEXT NOT NULL DEFAULT '',
    started_at      TEXT,
    updated_at      TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ','now')),
    completed_at    TEXT
);

-- Compact publication journals retain the latest change for each identity
-- key. They let mirror pushes publish bounded deltas while preserving
-- tombstones for targets that have been offline.
CREATE TABLE IF NOT EXISTS project_identity_observation_changes (
    project     TEXT NOT NULL,
    machine     TEXT NOT NULL,
    root_path   TEXT NOT NULL DEFAULT '',
    git_remote  TEXT NOT NULL DEFAULT '',
    revision    INTEGER NOT NULL,
    deleted     INTEGER NOT NULL DEFAULT 0 CHECK (deleted IN (0, 1)),
    PRIMARY KEY (project, machine, root_path, git_remote)
);

CREATE INDEX IF NOT EXISTS idx_project_identity_observation_changes_revision
    ON project_identity_observation_changes(revision);

CREATE TABLE IF NOT EXISTS session_project_identity_snapshot_changes (
    session_id  TEXT NOT NULL,
    project     TEXT NOT NULL,
    revision    INTEGER NOT NULL,
    deleted     INTEGER NOT NULL DEFAULT 0 CHECK (deleted IN (0, 1)),
    PRIMARY KEY (session_id, project)
);

CREATE INDEX IF NOT EXISTS idx_session_project_identity_snapshot_changes_revision
    ON session_project_identity_snapshot_changes(revision);

DROP TRIGGER IF EXISTS trg_project_identity_observations_revision_insert;
DROP TRIGGER IF EXISTS trg_project_identity_observations_revision_update;
DROP TRIGGER IF EXISTS trg_project_identity_observations_revision_delete;
DROP TRIGGER IF EXISTS trg_session_project_identity_snapshots_revision_insert;
DROP TRIGGER IF EXISTS trg_session_project_identity_snapshots_revision_update;
DROP TRIGGER IF EXISTS trg_session_project_identity_snapshots_revision_delete;

CREATE TRIGGER IF NOT EXISTS trg_project_identity_observations_revision_insert
AFTER INSERT ON project_identity_observations BEGIN
    INSERT INTO archive_metadata (key, value) VALUES ('project_identity_publication_revision', '1')
    ON CONFLICT(key) DO UPDATE SET value = CAST(CAST(value AS INTEGER) + 1 AS TEXT),
        updated_at = strftime('%Y-%m-%dT%H:%M:%fZ','now');
    INSERT INTO project_identity_observation_changes (
        project, machine, root_path, git_remote, revision, deleted
    ) VALUES (
        NEW.project, NEW.machine, NEW.root_path, NEW.git_remote,
        (SELECT CAST(value AS INTEGER) FROM archive_metadata
         WHERE key = 'project_identity_publication_revision'), 0
    ) ON CONFLICT(project, machine, root_path, git_remote) DO UPDATE SET
        revision = excluded.revision, deleted = 0;
END;

CREATE TRIGGER IF NOT EXISTS trg_project_identity_observations_revision_update
AFTER UPDATE ON project_identity_observations BEGIN
    INSERT INTO archive_metadata (key, value) VALUES ('project_identity_publication_revision', '1')
    ON CONFLICT(key) DO UPDATE SET value = CAST(CAST(value AS INTEGER) + 1 AS TEXT),
        updated_at = strftime('%Y-%m-%dT%H:%M:%fZ','now');
    INSERT INTO project_identity_observation_changes (
        project, machine, root_path, git_remote, revision, deleted
    ) VALUES (
        OLD.project, OLD.machine, OLD.root_path, OLD.git_remote,
        (SELECT CAST(value AS INTEGER) FROM archive_metadata
         WHERE key = 'project_identity_publication_revision'), 1
    ) ON CONFLICT(project, machine, root_path, git_remote) DO UPDATE SET
        revision = excluded.revision, deleted = 1;
    INSERT INTO project_identity_observation_changes (
        project, machine, root_path, git_remote, revision, deleted
    ) VALUES (
        NEW.project, NEW.machine, NEW.root_path, NEW.git_remote,
        (SELECT CAST(value AS INTEGER) FROM archive_metadata
         WHERE key = 'project_identity_publication_revision'), 0
    ) ON CONFLICT(project, machine, root_path, git_remote) DO UPDATE SET
        revision = excluded.revision, deleted = 0;
END;

CREATE TRIGGER IF NOT EXISTS trg_project_identity_observations_revision_delete
AFTER DELETE ON project_identity_observations BEGIN
    INSERT INTO archive_metadata (key, value) VALUES ('project_identity_publication_revision', '1')
    ON CONFLICT(key) DO UPDATE SET value = CAST(CAST(value AS INTEGER) + 1 AS TEXT),
        updated_at = strftime('%Y-%m-%dT%H:%M:%fZ','now');
    INSERT INTO project_identity_observation_changes (
        project, machine, root_path, git_remote, revision, deleted
    ) VALUES (
        OLD.project, OLD.machine, OLD.root_path, OLD.git_remote,
        (SELECT CAST(value AS INTEGER) FROM archive_metadata
         WHERE key = 'project_identity_publication_revision'), 1
    ) ON CONFLICT(project, machine, root_path, git_remote) DO UPDATE SET
        revision = excluded.revision, deleted = 1;
END;

CREATE TRIGGER IF NOT EXISTS trg_session_project_identity_snapshots_revision_insert
AFTER INSERT ON session_project_identity_snapshots BEGIN
    INSERT INTO archive_metadata (key, value) VALUES ('project_identity_publication_revision', '1')
    ON CONFLICT(key) DO UPDATE SET value = CAST(CAST(value AS INTEGER) + 1 AS TEXT),
        updated_at = strftime('%Y-%m-%dT%H:%M:%fZ','now');
    INSERT INTO session_project_identity_snapshot_changes (
        session_id, project, revision, deleted
    ) VALUES (
        NEW.session_id, NEW.project,
        (SELECT CAST(value AS INTEGER) FROM archive_metadata
         WHERE key = 'project_identity_publication_revision'), 0
    ) ON CONFLICT(session_id, project) DO UPDATE SET
        revision = excluded.revision, deleted = 0;
END;

CREATE TRIGGER IF NOT EXISTS trg_session_project_identity_snapshots_revision_update
AFTER UPDATE ON session_project_identity_snapshots BEGIN
    INSERT INTO archive_metadata (key, value) VALUES ('project_identity_publication_revision', '1')
    ON CONFLICT(key) DO UPDATE SET value = CAST(CAST(value AS INTEGER) + 1 AS TEXT),
        updated_at = strftime('%Y-%m-%dT%H:%M:%fZ','now');
    INSERT INTO session_project_identity_snapshot_changes (
        session_id, project, revision, deleted
    ) VALUES (
        OLD.session_id, OLD.project,
        (SELECT CAST(value AS INTEGER) FROM archive_metadata
         WHERE key = 'project_identity_publication_revision'), 1
    ) ON CONFLICT(session_id, project) DO UPDATE SET
        revision = excluded.revision, deleted = 1;
    INSERT INTO session_project_identity_snapshot_changes (
        session_id, project, revision, deleted
    ) VALUES (
        NEW.session_id, NEW.project,
        (SELECT CAST(value AS INTEGER) FROM archive_metadata
         WHERE key = 'project_identity_publication_revision'), 0
    ) ON CONFLICT(session_id, project) DO UPDATE SET
        revision = excluded.revision, deleted = 0;
END;

CREATE TRIGGER IF NOT EXISTS trg_session_project_identity_snapshots_revision_delete
AFTER DELETE ON session_project_identity_snapshots BEGIN
    INSERT INTO archive_metadata (key, value) VALUES ('project_identity_publication_revision', '1')
    ON CONFLICT(key) DO UPDATE SET value = CAST(CAST(value AS INTEGER) + 1 AS TEXT),
        updated_at = strftime('%Y-%m-%dT%H:%M:%fZ','now');
    INSERT INTO session_project_identity_snapshot_changes (
        session_id, project, revision, deleted
    ) VALUES (
        OLD.session_id, OLD.project,
        (SELECT CAST(value AS INTEGER) FROM archive_metadata
         WHERE key = 'project_identity_publication_revision'), 1
    ) ON CONFLICT(session_id, project) DO UPDATE SET
        revision = excluded.revision, deleted = 1;
END;

CREATE TRIGGER IF NOT EXISTS trg_sessions_create_project_identity_snapshot
AFTER INSERT ON sessions BEGIN
    INSERT INTO session_project_identity_snapshots (
        session_id, project, machine, root_path, worktree_relationship,
        checkout_state, git_branch, remote_resolution, observed_at
    ) VALUES (
        NEW.id, NEW.project, NEW.machine, NEW.cwd, 'unknown',
        CASE WHEN NEW.git_branch != '' THEN 'branch' ELSE 'unknown' END,
        NEW.git_branch, 'unknown', strftime('%Y-%m-%dT%H:%M:%fZ','now')
    ) ON CONFLICT(session_id) DO NOTHING;
END;

-- PG sync state: stores watermarks for push sync
CREATE TABLE IF NOT EXISTS pg_sync_state (
    key   TEXT PRIMARY KEY,
    value TEXT NOT NULL
);

-- Model pricing for cost calculation
CREATE TABLE IF NOT EXISTS model_pricing (
    model_pattern    TEXT PRIMARY KEY,
    input_per_mtok   REAL NOT NULL DEFAULT 0,
    output_per_mtok  REAL NOT NULL DEFAULT 0,
    cache_creation_per_mtok REAL NOT NULL DEFAULT 0,
    cache_read_per_mtok     REAL NOT NULL DEFAULT 0,
    updated_at       TEXT NOT NULL
        DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ','now'))
);

-- Git aggregation TTL cache: memoizes `git log --numstat` and
-- `gh pr list` results per (repo, author, window) tuple so
-- repeated `agentsview stats` invocations don't re-shell out.
CREATE TABLE IF NOT EXISTS git_cache (
    cache_key   TEXT PRIMARY KEY,          -- sha256(repo|author|since|until|kind)
    kind        TEXT NOT NULL,             -- 'log' | 'pr'
    payload     TEXT NOT NULL,             -- JSON-encoded result
    computed_at TEXT NOT NULL              -- RFC3339
);

-- Secret findings: persisted detections from internal/secrets.
-- Located by natural coordinates (no row IDs) so findings survive the
-- full-resync orphan copy. Only redacted values are stored.
CREATE TABLE IF NOT EXISTS secret_findings (
    id              INTEGER PRIMARY KEY,
    session_id      TEXT NOT NULL
        REFERENCES sessions(id) ON DELETE CASCADE,
    rule_name       TEXT NOT NULL,
    confidence      TEXT NOT NULL,
    location_kind   TEXT NOT NULL,
    message_ordinal INTEGER NOT NULL,
    call_index      INTEGER,
    event_index     INTEGER,
    match_start     INTEGER NOT NULL,
    match_end       INTEGER NOT NULL,
    match_index     INTEGER NOT NULL,
    redacted_match  TEXT NOT NULL,
    rules_version   TEXT NOT NULL,
    created_at      TEXT NOT NULL
        DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ','now'))
);

CREATE INDEX IF NOT EXISTS idx_secret_findings_session
    ON secret_findings(session_id);
CREATE INDEX IF NOT EXISTS idx_secret_findings_rule
    ON secret_findings(rule_name);