alma 0.1.1

A Bevy-native modal text editor with Vim-style navigation.
Documentation
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use super::{
    PluginRuntimeTraceEffect, PluginRuntimeTraceEvent, PluginRuntimeTraceEventClass,
    PluginRuntimeTraceEventKind, PluginRuntimeTraceProposalOutcome,
    PluginRuntimeTraceProposalRejection, PluginRuntimeTraceWorkspaceIoCompletion,
    PluginRuntimeTraceWorkspaceObserveTaskOutcome, PluginRuntimeTraceWorkspaceReadOutcome,
    PluginRuntimeTraceWorkspaceWriteOutcome,
};
use crate::{
    buffer::{BufferEdit, BufferEditKind, BufferEditShape},
    ecs::{
        components::buffer::{BufferEntity, BufferRevision, ViewEntity},
        events::edit::{
            PluginBufferEditProposalReceipt, PluginBufferEditProvenance, PluginProposalId,
        },
    },
    fs_utils::FilesystemConfig,
    plugin::{
        PendingPluginUpdateBatch, PendingPluginWorkspaceIoBatch, PluginCapabilities,
        PluginEffectBatchLimit, PluginHandleStore, PluginHostContext, PluginHostImportSession,
        PluginIdentity, PluginOperationalEvent, PluginOperationalImport, PluginOperationalQueue,
        PluginWorkspaceIoBudget, PluginWorkspaceIoWorkerQueue,
        PluginWorkspaceObserveTaskCompletion, PluginWorkspaceObserveTaskHandle,
        PluginWorkspaceObserveTaskQueue, WorkspacePathGrant, WorkspacePathRef,
    },
    text_stream::TextRevision,
};
use bevy::prelude::Entity;
use std::{
    fs,
    num::{NonZeroU64, NonZeroUsize},
    path::{Path, PathBuf},
    time::{SystemTime, UNIX_EPOCH},
};

#[test]
fn drained_effect_trace_is_redacted_and_structured() {
    let identity = identity("trace-effects");
    let buffer = BufferEntity(Entity::from_raw_u32(1).expect("entity"));
    let view = ViewEntity(Entity::from_raw_u32(2).expect("entity"));
    let mut pending =
        PendingPluginUpdateBatch::from_validated_limit(identity, PluginEffectBatchLimit::default());
    pending
        .propose_buffer_edit(
            crate::plugin::PluginBufferEditProposal::from_observed_revision(
                buffer,
                BufferEdit::insert(3, "secret inserted text"),
                TextRevision::from(7),
            ),
        )
        .expect("buffer edit should queue");
    pending
        .push_status_text(view, "secret status")
        .expect("status should queue");
    let report = pending.seal().drain();

    let trace = PluginRuntimeTraceEvent::drained_effects(&report);

    assert_eq!(trace.identity(), Some("trace-effects"));
    assert_eq!(trace.class(), PluginRuntimeTraceEventClass::EffectsDrained);
    let PluginRuntimeTraceEventKind::EffectsDrained { effects } = trace.kind() else {
        panic!("expected drained effects trace");
    };
    assert_eq!(effects.len(), 2);
    match &effects[0] {
        PluginRuntimeTraceEffect::BufferEdit {
            base_revision,
            edit,
            ..
        } => {
            assert_eq!(*base_revision, TextRevision::from(7));
            assert_eq!(edit.kind(), BufferEditKind::Insert);
            assert_eq!(edit.byte_index(), Some(3));
            assert_eq!(
                edit.replacement_byte_len(),
                Some("secret inserted text".len())
            );
        }
        other @ PluginRuntimeTraceEffect::Status { .. } => {
            panic!("expected buffer edit trace, got {other:?}");
        }
    }
    let rendered = trace.to_string();
    assert!(rendered.contains("effects-drained"));
    assert!(rendered.contains("replacement_byte_len=20"));
    assert!(rendered.contains("status info byte_len=13"));
    assert!(!format!("{trace:?}").contains("secret"));
    assert!(!rendered.contains("secret"));
}

#[test]
fn workspace_io_trace_is_operation_typed_and_redacted() {
    let root = temp_dir("trace-workspace-io");
    fs::create_dir(root.join("docs")).expect("docs directory should be created");
    fs::write(root.join("docs/input.txt"), "secret workspace bytes")
        .expect("fixture should be written");
    let filesystem = config(&root);
    let host = workspace_host();
    let mut batch = PendingPluginWorkspaceIoBatch::from_validated_budget(
        identity("trace-workspace"),
        PluginWorkspaceIoBudget::try_new(4, 64, 64).expect("budget should validate"),
    );
    let read = host
        .authorize_workspace_observe(
            WorkspacePathRef::try_from("docs/input.txt").expect("path should validate"),
        )
        .expect("read should authorize");
    batch.push_read(read).expect("read should queue");
    let write = host
        .authorize_workspace_artifact_write(
            WorkspacePathRef::try_from("docs/output.txt").expect("path should validate"),
        )
        .expect("write should authorize");
    batch
        .push_write(write, b"secret write bytes".to_vec())
        .expect("write should queue");

    let report = batch.seal().execute_synchronous(&filesystem);
    let trace = PluginRuntimeTraceEvent::workspace_io_completed(&report);

    assert_eq!(trace.identity(), Some("trace-workspace"));
    assert_eq!(
        trace.class(),
        PluginRuntimeTraceEventClass::WorkspaceIoCompleted
    );
    let PluginRuntimeTraceEventKind::WorkspaceIoCompleted { completions } = trace.kind() else {
        panic!("expected workspace I/O trace");
    };
    assert_eq!(completions.len(), 2);
    assert!(matches!(
        completions[0],
        PluginRuntimeTraceWorkspaceIoCompletion::Read {
            outcome: PluginRuntimeTraceWorkspaceReadOutcome::Ok { byte_len: 22, .. },
            ..
        }
    ));
    assert!(matches!(
        completions[1],
        PluginRuntimeTraceWorkspaceIoCompletion::Write {
            outcome: PluginRuntimeTraceWorkspaceWriteOutcome::Ok { .. },
            ..
        }
    ));
    let rendered = trace.to_string();
    assert!(rendered.contains("workspace-io-completed"));
    assert!(rendered.contains("path_byte_len=14"));
    assert!(rendered.contains("byte_len=22"));
    assert!(!format!("{trace:?}").contains("secret"));
    assert!(!rendered.contains("secret"));
    assert!(!rendered.contains(root.to_string_lossy().as_ref()));
    assert!(!rendered.contains("input.txt"));
    assert!(!rendered.contains("output.txt"));

    let _cleanup = fs::remove_dir_all(root);
}

#[test]
fn workspace_observe_task_trace_is_guest_shaped_and_redacted() {
    let root = temp_dir("trace-workspace-observe-task");
    fs::create_dir(root.join("docs")).expect("docs directory should be created");
    fs::write(root.join("docs/input.txt"), "secret task bytes").expect("fixture should be written");
    let filesystem = config(&root);
    let identity = identity("trace-workspace");
    let (task_handle, completion) =
        workspace_observe_task_completion(&identity, &filesystem, "docs/input.txt");
    let trace = PluginRuntimeTraceEvent::workspace_observe_task_completed(&completion);

    assert_eq!(trace.identity(), Some("trace-workspace"));
    assert_eq!(
        trace.class(),
        PluginRuntimeTraceEventClass::WorkspaceObserveTaskCompleted
    );
    let PluginRuntimeTraceEventKind::WorkspaceObserveTaskCompleted {
        completion: traced_completion,
    } = trace.kind()
    else {
        panic!("expected workspace observe task trace");
    };
    assert_eq!(traced_completion.handle(), &task_handle);
    assert_eq!(traced_completion.task_id(), task_handle.task_id());
    assert_eq!(traced_completion.task_id().get(), 1);
    let outcome =
        PluginRuntimeTraceWorkspaceObserveTaskOutcome::from(traced_completion.outcome_shape());
    assert_eq!(
        outcome,
        PluginRuntimeTraceWorkspaceObserveTaskOutcome::Bytes { byte_len: 17 }
    );
    assert!(outcome.is_ok());
    let rendered = trace.to_string();
    assert_eq!(
        rendered,
        "plugin \"trace-workspace\" trace workspace-observe-task-completed task_id=1 outcome=bytes byte_len=17"
    );
    assert!(!format!("{trace:?}").contains("secret"));
    assert!(!rendered.contains("secret"));
    assert!(!rendered.contains(root.to_string_lossy().as_ref()));
    assert!(!rendered.contains("input.txt"));

    let _cleanup = fs::remove_dir_all(root);
}

#[test]
fn workspace_cancellation_traces_are_redacted_and_structured() {
    let root = temp_dir("trace-workspace-cancel");
    fs::create_dir(root.join("docs")).expect("docs directory should be created");
    fs::write(root.join("docs/retained.txt"), "secret retained task bytes")
        .expect("retained fixture should be written");
    let filesystem = config(&root);
    let identity = identity("trace-cancel");
    let host = workspace_host_for(identity.as_str());

    let mut workspace_io = PendingPluginWorkspaceIoBatch::from_validated_budget(
        identity.clone(),
        PluginWorkspaceIoBudget::try_new(4, 64, 64).expect("budget should validate"),
    );
    let write = host
        .authorize_workspace_artifact_write(
            WorkspacePathRef::try_from("docs/secret-canceled.txt").expect("path should validate"),
        )
        .expect("write should authorize");
    workspace_io
        .push_write(write, b"secret canceled bytes".to_vec())
        .expect("write should queue");
    let mut workspace_queue = PluginWorkspaceIoWorkerQueue::default();
    workspace_queue
        .push(workspace_io.seal())
        .expect("sealed workspace I/O should queue");

    let workspace_report = workspace_queue.cancel_identity(&identity);
    let workspace_trace = PluginRuntimeTraceEvent::from(&workspace_report);

    assert_eq!(
        workspace_trace.class(),
        PluginRuntimeTraceEventClass::WorkspaceIoCanceled
    );
    let PluginRuntimeTraceEventKind::WorkspaceIoCanceled {
        canceled_batches,
        canceled_requests,
    } = workspace_trace.kind()
    else {
        panic!("expected workspace I/O cancellation trace");
    };
    assert_eq!((*canceled_batches, *canceled_requests), (1, 1));
    let rendered_workspace = workspace_trace.to_string();
    assert_eq!(
        rendered_workspace,
        "plugin \"trace-cancel\" trace workspace-io-canceled batches=1 requests=1"
    );
    assert!(!format!("{workspace_trace:?}").contains("secret"));
    assert!(!rendered_workspace.contains("secret"));
    assert!(!rendered_workspace.contains("secret-canceled.txt"));

    let handles = PluginHandleStore::new(identity.clone());
    let mut session = PluginHostImportSession::new(
        &host,
        &handles,
        PluginEffectBatchLimit::default(),
        PluginWorkspaceIoBudget::try_new(4, 64, 64).expect("budget should validate"),
    )
    .expect("session should start");
    let mut task_queue = PluginWorkspaceObserveTaskQueue::default();
    let _retained_handle = session
        .queue_workspace_observe_task(
            WorkspacePathRef::try_from("docs/retained.txt").expect("path should validate"),
            &mut task_queue,
        )
        .expect("retained task should reserve");
    let _pending_handle = session
        .queue_workspace_observe_task(
            WorkspacePathRef::try_from("docs/pending-secret.txt").expect("path should validate"),
            &mut task_queue,
        )
        .expect("pending task should reserve");
    let observe_tasks = session.seal().into_parts().workspace_observe_tasks;
    let _enqueue = observe_tasks
        .enqueue(&mut task_queue)
        .expect("sealed observe tasks should enqueue");
    let _retained = task_queue
        .execute_next(&filesystem)
        .expect("first task should become retained");

    let task_report = task_queue.cancel_identity(&identity);
    let task_trace = PluginRuntimeTraceEvent::from(&task_report);

    assert_eq!(
        task_trace.class(),
        PluginRuntimeTraceEventClass::WorkspaceObserveTasksCanceled
    );
    let PluginRuntimeTraceEventKind::WorkspaceObserveTasksCanceled {
        canceled_pending,
        discarded_retained,
    } = task_trace.kind()
    else {
        panic!("expected workspace observe task cancellation trace");
    };
    assert_eq!((*canceled_pending, *discarded_retained), (1, 1));
    let rendered_tasks = task_trace.to_string();
    assert_eq!(
        rendered_tasks,
        "plugin \"trace-cancel\" trace workspace-observe-tasks-canceled pending=1 retained=1"
    );
    assert!(!format!("{task_trace:?}").contains("secret"));
    assert!(!rendered_tasks.contains("secret"));
    assert!(!rendered_tasks.contains("retained.txt"));
    assert!(!rendered_tasks.contains("pending-secret.txt"));
    assert!(!rendered_tasks.contains(root.to_string_lossy().as_ref()));

    let _cleanup = fs::remove_dir_all(root);
}

#[test]
fn operational_trace_keeps_closed_event_shape() {
    let identity = identity("trace-operational");
    let event = PluginOperationalEvent::denied_import(
        &identity,
        PluginOperationalImport::WorkspaceArtifactWrite,
    );
    let trace = PluginRuntimeTraceEvent::operational(&event);

    assert_eq!(trace.identity(), Some("trace-operational"));
    assert_eq!(trace.class(), PluginRuntimeTraceEventClass::Operational);
    assert_eq!(
        trace.to_string(),
        "plugin \"trace-operational\" trace operational denied-import import=workspace.artifact_write"
    );
    assert!(!format!("{trace:?}").contains("docs/secret.txt"));
}

#[test]
fn unscoped_operational_trace_stays_unscoped() {
    let event = PluginOperationalEvent::queue_saturated(
        PluginOperationalQueue::WorkspaceIo,
        count_limit(1),
    );
    let trace = PluginRuntimeTraceEvent::operational(&event);

    assert_eq!(trace.identity(), None);
    assert_eq!(
        trace.to_string(),
        "plugin trace operational queue-saturated queue=workspace-io limit=1"
    );
}

#[test]
fn proposal_receipt_trace_redacts_edit_payload_and_owner_error_detail() {
    let source = identity("trace-proposal");
    let provenance = PluginBufferEditProvenance::buffer_propose_edit(source, TextRevision::from(7))
        .with_proposal_id(PluginProposalId::from_nonzero(
            NonZeroU64::new(9).expect("non-zero proposal"),
        ));
    let target = BufferEntity(Entity::from_raw_u32(1).expect("entity"));
    let edit = BufferEdit::replace_unchecked(0..4, "secret replacement");
    let receipt = PluginBufferEditProposalReceipt::owner_applied(
        &provenance,
        target,
        BufferEditShape::from_edit(&edit),
        BufferRevision {
            revision: TextRevision::from(7),
        },
        BufferRevision {
            revision: TextRevision::from(8),
        },
    )
    .expect("proposal id should produce receipt");

    let trace = PluginRuntimeTraceEvent::proposal_receipt(&receipt);

    assert_eq!(trace.identity(), Some("trace-proposal"));
    let PluginRuntimeTraceEventKind::ProposalReceipt { receipt } = trace.kind() else {
        panic!("expected proposal receipt trace");
    };
    assert_eq!(receipt.proposal(), 9);
    assert_eq!(receipt.proposed().kind(), BufferEditKind::Replace);
    assert_eq!(
        receipt.outcome(),
        &PluginRuntimeTraceProposalOutcome::Applied {
            previous_revision: TextRevision::from(7),
            current_revision: TextRevision::from(8),
        }
    );
    let rendered = trace.to_string();
    assert!(rendered.contains("proposal=9"));
    assert!(rendered.contains("replacement_byte_len=18"));
    assert!(!format!("{trace:?}").contains("secret"));
    assert!(!rendered.contains("secret"));
}

#[test]
fn stale_proposal_trace_uses_closed_rejection_shape() {
    let source = identity("trace-stale");
    let provenance = PluginBufferEditProvenance::buffer_propose_edit(source, TextRevision::from(7))
        .with_proposal_id(PluginProposalId::from_nonzero(
            NonZeroU64::new(10).expect("non-zero proposal"),
        ));
    let target = BufferEntity(Entity::from_raw_u32(1).expect("entity"));
    let edit = BufferEdit::insert(0, "secret");
    let reason = crate::ecs::events::edit::BufferEditRejectionReason::StaleRevision {
        expected: TextRevision::from(7),
        actual: TextRevision::from(9),
    };
    let receipt = PluginBufferEditProposalReceipt::owner_rejected(
        &provenance,
        target,
        BufferEditShape::from_edit(&edit),
        &reason,
    )
    .expect("proposal id should produce receipt");

    let trace = PluginRuntimeTraceEvent::proposal_receipt(&receipt);
    let PluginRuntimeTraceEventKind::ProposalReceipt { receipt } = trace.kind() else {
        panic!("expected proposal receipt trace");
    };

    assert_eq!(
        receipt.outcome(),
        &PluginRuntimeTraceProposalOutcome::Rejected {
            owner: super::PluginRuntimeTraceProposalOwner::BufferOwner,
            reason: PluginRuntimeTraceProposalRejection::StaleRevision {
                expected: TextRevision::from(7),
                actual: TextRevision::from(9),
            },
        }
    );
    assert!(!trace.to_string().contains("secret"));
}

#[test]
fn individual_discard_reports_adapt_to_update_discard_trace() {
    let view = ViewEntity(Entity::from_raw_u32(2).expect("entity"));
    let mut effects = PendingPluginUpdateBatch::from_validated_limit(
        identity("trace-effects"),
        PluginEffectBatchLimit::default(),
    );
    effects
        .push_status_text(view, "secret discarded status")
        .expect("status should queue");
    let effects_trace = PluginRuntimeTraceEvent::from(&effects.discard());

    assert_eq!(
        effects_trace.class(),
        PluginRuntimeTraceEventClass::UpdateDiscarded
    );
    assert_eq!(
        effects_trace.to_string(),
        "plugin \"trace-effects\" trace update-discarded effects=1 workspace_io=0 workspace_observe_tasks=0"
    );
    assert!(!effects_trace.to_string().contains("secret"));

    let host = workspace_host_for("trace-workspace-io");
    let mut workspace_io = PendingPluginWorkspaceIoBatch::from_validated_budget(
        identity("trace-workspace-io"),
        PluginWorkspaceIoBudget::try_new(4, 64, 64).expect("budget should validate"),
    );
    let read = host
        .authorize_workspace_observe(
            WorkspacePathRef::try_from("docs/missing.txt").expect("path should validate"),
        )
        .expect("read should authorize");
    workspace_io.push_read(read).expect("read should queue");
    let workspace_trace = PluginRuntimeTraceEvent::from(&workspace_io.discard());

    assert_eq!(
        workspace_trace.to_string(),
        "plugin \"trace-workspace-io\" trace update-discarded effects=0 workspace_io=1 workspace_observe_tasks=0"
    );
    assert!(!workspace_trace.to_string().contains("missing.txt"));

    let task_identity = identity("trace-task");
    let task_host = workspace_host_for(task_identity.as_str());
    let handles = PluginHandleStore::new(task_identity);
    let mut task_queue = PluginWorkspaceObserveTaskQueue::default();
    let mut session = PluginHostImportSession::new(
        &task_host,
        &handles,
        PluginEffectBatchLimit::default(),
        PluginWorkspaceIoBudget::try_new(4, 64, 64).expect("budget should validate"),
    )
    .expect("session should start");
    let _task_handle = session
        .queue_workspace_observe_task(
            WorkspacePathRef::try_from("docs/task.txt").expect("path should validate"),
            &mut task_queue,
        )
        .expect("task should reserve");
    let discard = session.discard();
    let task_trace = PluginRuntimeTraceEvent::from(discard.workspace_observe_tasks());

    assert_eq!(
        task_trace.to_string(),
        "plugin \"trace-task\" trace update-discarded effects=0 workspace_io=0 workspace_observe_tasks=1"
    );
    assert!(!task_trace.to_string().contains("task.txt"));
    assert_eq!(task_queue.reserved_pending_len(), 0);
}

#[test]
fn owner_discard_report_adapts_to_update_discard_trace() {
    let rendered = owner_discarded_trace_line(identity("trace-owner-work"));

    assert_eq!(
        rendered,
        "plugin \"trace-owner-work\" trace update-discarded effects=1 workspace_io=1 workspace_observe_tasks=0"
    );
    assert!(!rendered.contains("secret"));
    assert!(!rendered.contains("owner-output"));
}

#[test]
fn runtime_trace_replay_golden_is_redacted_and_stable() {
    let rendered = runtime_trace_replay_lines().join("\n") + "\n";
    let golden = fs::read_to_string(runtime_trace_golden_path("v1.redacted.golden"))
        .expect("runtime trace golden should read");

    assert_eq!(rendered, golden);
    assert!(!rendered.contains("secret"));
    assert!(!rendered.contains("missing.txt"));
    assert!(!rendered.contains("output.txt"));
}

fn runtime_trace_replay_lines() -> Vec<String> {
    let identity = identity("trace-replay");
    vec![
        drained_effect_trace_line(identity.clone()),
        discarded_update_trace_line(identity.clone()),
        owner_discarded_trace_line(identity.clone()),
        rejected_workspace_io_trace_line(identity.clone()),
        workspace_io_cancellation_trace_line(&identity),
        workspace_observe_task_trace_line(&identity),
        workspace_observe_task_cancellation_trace_line(&identity),
        PluginRuntimeTraceEvent::operational(&PluginOperationalEvent::denied_import(
            &identity,
            PluginOperationalImport::WorkspaceArtifactWrite,
        ))
        .to_string(),
        PluginRuntimeTraceEvent::operational(&PluginOperationalEvent::queue_saturated(
            PluginOperationalQueue::WorkspaceIo,
            count_limit(1),
        ))
        .to_string(),
        proposal_receipt_trace_line(identity),
    ]
}

fn drained_effect_trace_line(identity: PluginIdentity) -> String {
    let buffer = BufferEntity(Entity::from_raw_u32(1).expect("entity"));
    let view = ViewEntity(Entity::from_raw_u32(2).expect("entity"));
    let mut pending =
        PendingPluginUpdateBatch::from_validated_limit(identity, PluginEffectBatchLimit::default());
    pending
        .propose_buffer_edit(
            crate::plugin::PluginBufferEditProposal::from_observed_revision(
                buffer,
                BufferEdit::insert(3, "secret inserted text"),
                TextRevision::from(7),
            ),
        )
        .expect("buffer edit should queue");
    pending
        .push_status_text(view, "secret status")
        .expect("status should queue");

    PluginRuntimeTraceEvent::drained_effects(&pending.seal().drain()).to_string()
}

fn discarded_update_trace_line(identity: PluginIdentity) -> String {
    let view = ViewEntity(Entity::from_raw_u32(2).expect("entity"));
    let host = PluginHostContext::for_test(
        identity.as_str(),
        PluginCapabilities {
            status_publish: true,
            workspace_observe: vec![WorkspacePathGrant::new("docs")],
            ..PluginCapabilities::default()
        },
    );
    let mut handles = PluginHandleStore::new(identity);
    let view_handle = handles.issue_view(view).expect("view handle");
    let mut session = PluginHostImportSession::new(
        &host,
        &handles,
        PluginEffectBatchLimit::default(),
        PluginWorkspaceIoBudget::try_new(4, 64, 64).expect("budget should validate"),
    )
    .expect("session should start");
    let mut observe_tasks = PluginWorkspaceObserveTaskQueue::default();

    session
        .push_status_text(view_handle, "secret discarded status")
        .expect("status should queue");
    session
        .queue_workspace_observe(
            WorkspacePathRef::try_from("docs/missing.txt").expect("path should validate"),
        )
        .expect("workspace read should queue");
    let _task_handle = session
        .queue_workspace_observe_task(
            WorkspacePathRef::try_from("docs/task.txt").expect("path should validate"),
            &mut observe_tasks,
        )
        .expect("workspace task should reserve");

    PluginRuntimeTraceEvent::update_discarded(&session.discard()).to_string()
}

fn owner_discarded_trace_line(identity: PluginIdentity) -> String {
    let view = ViewEntity(Entity::from_raw_u32(3).expect("entity"));
    let host = PluginHostContext::for_test(
        identity.as_str(),
        PluginCapabilities {
            status_publish: true,
            workspace_artifact_write: vec![WorkspacePathGrant::new("docs")],
            ..PluginCapabilities::default()
        },
    );
    let mut handles = PluginHandleStore::new(identity);
    let view_handle = handles.issue_view(view).expect("view handle");
    let mut session = PluginHostImportSession::new(
        &host,
        &handles,
        PluginEffectBatchLimit::default(),
        PluginWorkspaceIoBudget::try_new(4, 64, 64).expect("budget should validate"),
    )
    .expect("session should start");

    session
        .push_status_text(view_handle, "secret owner-discard status")
        .expect("status should queue");
    session
        .queue_workspace_artifact_write(
            WorkspacePathRef::try_from("docs/secret-owner-output.txt")
                .expect("path should validate"),
            b"secret owner-discard bytes".to_vec(),
        )
        .expect("workspace write should queue");

    let update = session.seal().into_owner_and_workspace_observe_tasks();
    PluginRuntimeTraceEvent::owner_work_discarded(&update.owner_batches.discard()).to_string()
}

fn rejected_workspace_io_trace_line(identity: PluginIdentity) -> String {
    let root = temp_dir("trace-replay-workspace-io");
    fs::create_dir(root.join("docs")).expect("docs directory should be created");
    let filesystem = config(&root);
    let host = workspace_host_for(identity.as_str());
    let mut batch = PendingPluginWorkspaceIoBatch::from_validated_budget(
        identity,
        PluginWorkspaceIoBudget::try_new(4, 64, 64).expect("budget should validate"),
    );
    let read = host
        .authorize_workspace_observe(
            WorkspacePathRef::try_from("docs/missing.txt").expect("path should validate"),
        )
        .expect("read should authorize");
    batch.push_read(read).expect("read should queue");
    let write = host
        .authorize_workspace_artifact_write(
            WorkspacePathRef::try_from("docs/missing/output.txt").expect("path should validate"),
        )
        .expect("write should authorize");
    batch
        .push_write(write, b"secret write bytes".to_vec())
        .expect("write should queue");

    let report = batch.seal().execute_synchronous(&filesystem);
    let rendered = PluginRuntimeTraceEvent::workspace_io_completed(&report).to_string();
    let _cleanup = fs::remove_dir_all(root);
    rendered
}

fn workspace_io_cancellation_trace_line(identity: &PluginIdentity) -> String {
    let host = workspace_host_for(identity.as_str());
    let mut batch = PendingPluginWorkspaceIoBatch::from_validated_budget(
        identity.clone(),
        PluginWorkspaceIoBudget::try_new(4, 64, 64).expect("budget should validate"),
    );
    let write = host
        .authorize_workspace_artifact_write(
            WorkspacePathRef::try_from("docs/secret-canceled.txt").expect("path should validate"),
        )
        .expect("write should authorize");
    batch
        .push_write(write, b"secret canceled bytes".to_vec())
        .expect("write should queue");
    let mut queue = PluginWorkspaceIoWorkerQueue::default();
    queue
        .push(batch.seal())
        .expect("sealed workspace I/O should queue");

    PluginRuntimeTraceEvent::workspace_io_canceled(&queue.cancel_identity(identity)).to_string()
}

fn workspace_observe_task_trace_line(identity: &PluginIdentity) -> String {
    let root = temp_dir("trace-replay-observe-task");
    fs::create_dir(root.join("docs")).expect("docs directory should be created");
    fs::write(root.join("docs/input.txt"), "secret task bytes").expect("fixture should be written");
    let filesystem = config(&root);
    let (_task_id, completion) =
        workspace_observe_task_completion(identity, &filesystem, "docs/input.txt");
    let rendered =
        PluginRuntimeTraceEvent::workspace_observe_task_completed(&completion).to_string();
    let _cleanup = fs::remove_dir_all(root);
    rendered
}

fn workspace_observe_task_cancellation_trace_line(identity: &PluginIdentity) -> String {
    let root = temp_dir("trace-replay-observe-task-cancel");
    fs::create_dir(root.join("docs")).expect("docs directory should be created");
    fs::write(root.join("docs/retained.txt"), "secret retained task bytes")
        .expect("fixture should be written");
    let filesystem = config(&root);
    let host = workspace_host_for(identity.as_str());
    let handles = PluginHandleStore::new(identity.clone());
    let mut queue = PluginWorkspaceObserveTaskQueue::default();
    let mut session = PluginHostImportSession::new(
        &host,
        &handles,
        PluginEffectBatchLimit::default(),
        PluginWorkspaceIoBudget::try_new(4, 64, 64).expect("budget should validate"),
    )
    .expect("session should start");
    for path in ["docs/retained.txt", "docs/pending-secret.txt"] {
        let _task_handle = session
            .queue_workspace_observe_task(
                WorkspacePathRef::try_from(path).expect("path should validate"),
                &mut queue,
            )
            .expect("task handle should reserve");
    }
    let batches = session.seal().into_parts();
    let _enqueue = batches
        .workspace_observe_tasks
        .enqueue(&mut queue)
        .expect("sealed task batch should enqueue");
    let _completion = queue
        .execute_next(&filesystem)
        .expect("task should execute");

    let rendered =
        PluginRuntimeTraceEvent::workspace_observe_tasks_canceled(&queue.cancel_identity(identity))
            .to_string();
    let _cleanup = fs::remove_dir_all(root);
    rendered
}

fn workspace_observe_task_completion(
    identity: &PluginIdentity,
    filesystem: &FilesystemConfig,
    path: &str,
) -> (
    PluginWorkspaceObserveTaskHandle,
    PluginWorkspaceObserveTaskCompletion,
) {
    let host = workspace_host_for(identity.as_str());
    let handles = PluginHandleStore::new(identity.clone());
    let mut queue = PluginWorkspaceObserveTaskQueue::default();
    let mut session = PluginHostImportSession::new(
        &host,
        &handles,
        PluginEffectBatchLimit::default(),
        PluginWorkspaceIoBudget::try_new(4, 64, 64).expect("budget should validate"),
    )
    .expect("session should start");
    let task_resource_authority = session
        .queue_workspace_observe_task(
            WorkspacePathRef::try_from(path).expect("path should validate"),
            &mut queue,
        )
        .expect("task handle should reserve");
    let task_handle = task_resource_authority.handle().clone();
    let batches = session.seal().into_parts();
    let enqueue = batches
        .workspace_observe_tasks
        .enqueue(&mut queue)
        .expect("sealed task batch should enqueue");
    assert_eq!(enqueue.task_handles()[0], task_handle);
    let completion = queue.execute_next(filesystem).expect("task should execute");
    (task_handle, completion)
}

fn proposal_receipt_trace_line(identity: PluginIdentity) -> String {
    let provenance =
        PluginBufferEditProvenance::buffer_propose_edit(identity, TextRevision::from(7))
            .with_proposal_id(PluginProposalId::from_nonzero(
                NonZeroU64::new(9).expect("non-zero proposal"),
            ));
    let target = BufferEntity(Entity::from_raw_u32(1).expect("entity"));
    let edit = BufferEdit::replace_unchecked(0..4, "secret replacement");
    let receipt = PluginBufferEditProposalReceipt::owner_applied(
        &provenance,
        target,
        BufferEditShape::from_edit(&edit),
        BufferRevision {
            revision: TextRevision::from(7),
        },
        BufferRevision {
            revision: TextRevision::from(8),
        },
    )
    .expect("proposal id should produce receipt");

    PluginRuntimeTraceEvent::proposal_receipt(&receipt).to_string()
}

fn identity(identity: &str) -> PluginIdentity {
    PluginIdentity::try_new(identity).expect("test identity should validate")
}

fn count_limit(value: usize) -> NonZeroUsize {
    NonZeroUsize::new(value).expect("test count limit should be non-zero")
}

fn workspace_host() -> PluginHostContext {
    workspace_host_for("trace-workspace")
}

fn workspace_host_for(identity: &str) -> PluginHostContext {
    PluginHostContext::for_test(
        identity,
        PluginCapabilities {
            workspace_observe: vec![WorkspacePathGrant::new("docs")],
            workspace_artifact_write: vec![WorkspacePathGrant::new("docs")],
            ..PluginCapabilities::default()
        },
    )
}

fn temp_dir_path(name: &str) -> PathBuf {
    let nanos = SystemTime::now()
        .duration_since(UNIX_EPOCH)
        .expect("system time should be after unix epoch")
        .as_nanos();
    std::env::temp_dir().join(format!(
        "alma-plugin-trace-{name}-{}-{nanos}",
        std::process::id()
    ))
}

fn temp_dir(name: &str) -> PathBuf {
    let path = temp_dir_path(name);
    fs::create_dir(&path).expect("temporary directory should be created");
    path
}

fn config(root: &Path) -> FilesystemConfig {
    FilesystemConfig {
        workspace_root: root.canonicalize().expect("root should canonicalize"),
        max_file_bytes: 128,
    }
}

fn runtime_trace_golden_path(name: &str) -> PathBuf {
    PathBuf::from(env!("CARGO_MANIFEST_DIR"))
        .join("tests/goldens/plugin/runtime-trace")
        .join(name)
}