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My version of https://github.com/vercel-labs/fx
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Host contract:// - fields: command_output_blocks, folded_command_blocks,// command_output_display, command_output_render,// entries, transcript, transcript_band_dirty, replaceable_last_line,// replaceable_start, footer_viewport, viewport_top_row, cursor_row,// cursor_col, layout// - methods: assertCanMutateTranscript, appendRawBytesEntryClassified,// attachCommandOutputEntryForLifecycle,// writeRecordedCommandOutputChunkAtomic,// flushRecordedCommandOutputSummaryAtomic,// rebuildTranscriptCacheFromEntries,// rebuildTranscriptCacheAfterStructuredRewrite,// recomputeCursorFromTranscript, enforceStructuredRetention,// enforceStructuredRetentionAndReport
const std = @import("std");const debug_trace = @import("../../core/shared/debug_trace.zig");const display_width = @import("../../core/shared/display_width.zig");const io_mod = @import("../../core/shared/io.zig");const types = @import("../../core/shared/types.zig");const command_output_content = @import("../../core/tooling/command_output_content.zig");const render_engine = @import("../render_engine.zig");const assistant_wrap = @import("../render_engine/assistant_wrap.zig");
const Allocator = std.mem.Allocator;const Metrics = types.Metrics;const transcript_blocks = render_engine.transcript_blocks;
const Styles = transcript_blocks.Styles;
fn requestTranscriptPaint(shell: anytype, entry_id: ?u32) void { const Runtime = @TypeOf(shell.*); if (entry_id) |dirty_entry_id| { if (comptime @hasDecl(Runtime, "markTranscriptCommandOutputDirtyFrom")) { shell.markTranscriptCommandOutputDirtyFrom(dirty_entry_id); return; } } if (comptime @hasDecl(Runtime, "markTranscriptCommandOutputDirty")) { shell.markTranscriptCommandOutputDirty(); } else if (comptime @hasDecl(Runtime, "markTranscriptContentDirty")) { shell.markTranscriptContentDirty(); } else if (comptime @hasDecl(Runtime, "markTranscriptDirty")) { shell.markTranscriptDirty(); } else { shell.transcript_band_dirty = true; }}
fn commandBlockDirtyEntryId(block: CommandOutputBlock) ?u32 { if (block.entry_id) |entry_id| return entry_id; if (block.live_entry_ids.items.len > 0) return block.live_entry_ids.items[0]; if (block.source_entry_ids.items.len > 0) return block.source_entry_ids.items[0]; for (block.lines.items) |line| { if (line.entry_id) |entry_id| return entry_id; } return null;}
pub fn openCommandOutputDirtyEntryId(shell: anytype) ?u32 { const index = shell.command_output_display.open_command_block orelse return null; if (index >= shell.command_output_blocks.items.len) return null; return commandBlockDirtyEntryId(shell.command_output_blocks.items[index]);}
pub const CommandOutputLine = struct { stream: command_output_content.Stream, text: []u8, record_ordinal: usize = 0, entry_id: ?u32 = null, terminated: bool = false, visible: bool = true,};
pub const CommandOutputPrunedRange = struct { anchor_entry_id: u32, start_record: usize, end_record: usize,};
const command_output_line_descriptor_bytes = @sizeOf(CommandOutputLine);const command_output_entry_descriptor_bytes = @sizeOf(transcript_blocks.TranscriptEntry);const command_output_source_id_descriptor_bytes = @sizeOf(u32);const command_output_pruned_range_descriptor_bytes = @sizeOf(CommandOutputPrunedRange);
pub const CommandOutputBlock = struct { entry_id: ?u32 = null, lifecycle_id: ?types.ToolLifecycleId = null, total_lines: usize = 0, retained_text_bytes: usize = 0, lines: std.ArrayList(CommandOutputLine) = .empty, decoders: [2]command_output_content.Decoder = .{ .{}, .{} }, open_line_indices: [2]?usize = .{ null, null }, overflow_open_records: [2]bool = .{ false, false }, overflow_record_visible: [2]bool = .{ false, false }, retention_overflow: bool = false, /// First retained record whose text became incomplete at the structured /// cap. Records before this index are stable for active Ctrl-O projection. overflow_line_index: ?usize = null, pruned_ranges: std.ArrayList(CommandOutputPrunedRange) = .empty, live_entry_ids: std.ArrayList(u32) = .empty, source_entry_ids: std.ArrayList(u32) = .empty,
pub fn deinit(self: *CommandOutputBlock, alloc: Allocator) void { if (self.lifecycle_id) |id| alloc.free(@constCast(id.call_id)); for (self.lines.items) |line| alloc.free(line.text); self.lines.deinit(alloc); self.pruned_ranges.deinit(alloc); self.live_entry_ids.deinit(alloc); self.source_entry_ids.deinit(alloc); }
pub fn canReconstructEntries(self: CommandOutputBlock) bool { return self.pruned_ranges.items.len == 0 and self.lines.items.len >= self.live_entry_ids.items.len and self.lines.items.len >= self.source_entry_ids.items.len; }};
pub const FoldedCommandBlock = struct { summary_transcript_index: usize = 0, summary_entry_id: ?u32 = null, lines: std.ArrayList(CommandOutputLine) = .empty,
pub fn deinit(self: *FoldedCommandBlock, alloc: Allocator) void { for (self.lines.items) |line| alloc.free(line.text); self.lines.deinit(alloc); }};
pub const CommandOutputRenderPolicy = struct { styles: Styles = .{ .system_notice_label_style = "", .system_notice_text_style = "", .reset_style = "", .dim_style = "", .red_style = "", },};
test "command output render policy has no presentation mode" { try std.testing.expect(!@hasField(CommandOutputRenderPolicy, "output_level"));}
pub const compact_output_row_limit: usize = 5;
pub const CommandOutputEntryProjection = struct { entry_id: u32, byte_start: usize, byte_end: usize,};
pub const CommandOutputProjection = struct { bytes: std.ArrayList(u8) = .empty, entries: std.ArrayList(CommandOutputEntryProjection) = .empty,
pub fn deinit(self: *CommandOutputProjection, alloc: Allocator) void { self.bytes.deinit(alloc); self.entries.deinit(alloc); self.* = undefined; }
pub fn bytesForEntry(self: *const CommandOutputProjection, entry_id: u32) ?[]const u8 { for (self.entries.items) |entry| { if (entry.entry_id != entry_id) continue; return self.bytes.items[entry.byte_start..entry.byte_end]; } return null; }};
pub fn foldedBlockRetainedBytes(block: FoldedCommandBlock) usize { var total: usize = 0; for (block.lines.items) |line| total += line.text.len; return total;}
pub fn commandOutputBlockRetainedBytes(block: CommandOutputBlock) usize { var total = block.retained_text_bytes; for (block.lines.items) |line| { total +|= command_output_line_descriptor_bytes; if (line.entry_id != null) total +|= command_output_entry_descriptor_bytes; } total +|= block.pruned_ranges.items.len *| (command_output_pruned_range_descriptor_bytes +| command_output_entry_descriptor_bytes); total +|= (block.live_entry_ids.items.len +| block.source_entry_ids.items.len) *| command_output_source_id_descriptor_bytes; return total;}
pub fn commandOutputLineRetainedBytes(text_bytes: usize) usize { return text_bytes +| command_output_line_descriptor_bytes +| command_output_entry_descriptor_bytes +| command_output_source_id_descriptor_bytes;}
pub fn commandOutputAdmissionBytes(raw: []const u8) usize { var decoder: command_output_content.Decoder = .{}; var sink: CommandOutputAdmissionSink = .{}; if (raw.len > 0) sink.beginRecord() catch return std.math.maxInt(usize); decoder.append(raw, &sink) catch return std.math.maxInt(usize); return sink.text_bytes +| sink.record_count *| commandOutputLineRetainedBytes(0);}
const CommandOutputAdmissionSink = struct { text_bytes: usize = 0, current_record_bytes: usize = 0, record_count: usize = 0, open: bool = false,
pub fn beginRecord(self: *CommandOutputAdmissionSink) error{}!void { if (self.open) return; self.open = true; self.current_record_bytes = 0; self.record_count +|= 1; }
pub fn appendText(self: *CommandOutputAdmissionSink, bytes: []const u8) error{}!void { try self.beginRecord(); self.text_bytes +|= bytes.len; self.current_record_bytes +|= bytes.len; }
pub fn finishLine(self: *CommandOutputAdmissionSink) error{}!void { try self.beginRecord(); self.open = false; self.current_record_bytes = 0; }
pub fn replaceLine(self: *CommandOutputAdmissionSink) error{}!void { try self.beginRecord(); self.text_bytes -|= self.current_record_bytes; self.current_record_bytes = 0; }};
pub fn commandArtifactHandleFromResult(result: []const u8) ?[]const u8 { const prefix = "output_file="; var truncated = false; var has_stdout_bytes = false; var has_stderr_bytes = false; var lines = std.mem.splitScalar(u8, result, '\n'); while (lines.next()) |raw_line| { const line = std.mem.trimEnd(u8, raw_line, "\r"); if (std.mem.eql(u8, line, "<stdout>") or std.mem.eql(u8, line, "<stderr>")) return null; if (std.mem.eql(u8, line, "truncated=true")) { truncated = true; continue; } if (std.mem.startsWith(u8, line, "stdout_bytes=")) { has_stdout_bytes = true; continue; } if (std.mem.startsWith(u8, line, "stderr_bytes=")) { has_stderr_bytes = true; continue; } if (!std.mem.startsWith(u8, line, prefix)) continue; if (!truncated or !has_stdout_bytes or !has_stderr_bytes) return null;
const path = line[prefix.len..]; const handle = std.fs.path.basename(path); if (std.mem.startsWith(u8, handle, "fx-command-") and std.mem.endsWith(u8, handle, ".log") and !std.mem.endsWith(u8, handle, ".stdout.log") and !std.mem.endsWith(u8, handle, ".stderr.log")) { return handle; } return null; } return null;}
pub fn removeFoldedCommandBlock(shell: anytype, alloc: Allocator, index: usize) void { var block = shell.folded_command_blocks.orderedRemove(index); block.deinit(alloc);
if (shell.command_output_display.open_block) |open| { if (open == index) { shell.command_output_display.open_block = null; } else if (open > index) { shell.command_output_display.open_block = open - 1; } }}
pub fn removeCommandOutputBlock(shell: anytype, alloc: Allocator, index: usize) void { var block = shell.command_output_blocks.orderedRemove(index); block.deinit(alloc);
if (shell.command_output_display.open_command_block) |open| { if (open == index) { shell.command_output_display.open_command_block = null; } else if (open > index) { shell.command_output_display.open_command_block = open - 1; } }}
pub fn resetCommandOutputDisplay(shell: anytype, alloc: Allocator, reason: []const u8) void { if (shell.command_output_display.open_command_block) |index| { if (index < shell.command_output_blocks.items.len and shell.command_output_blocks.items[index].entry_id == null) { debug_trace.logf("command_output", "dropping buffered command output lines={d} reason={s}", .{ shell.command_output_blocks.items[index].total_lines, reason }); removeCommandOutputBlock(shell, alloc, index); } } shell.command_output_display = .{};}
pub fn setCommandOutputRenderPolicy(shell: anytype, styles: Styles) void { shell.command_output_render = .{ .styles = styles, };}
const PreparedCanonicalRecord = struct { text: []u8, placeholder: []u8,};
const PreparedCanonicalBatch = struct { block_index: usize, stream: command_output_content.Stream, total_record_count: usize, retained_bytes_after: usize, records: std.ArrayList(PreparedCanonicalRecord) = .empty,
fn deinit(self: *PreparedCanonicalBatch, alloc: Allocator) void { for (self.records.items) |record| { alloc.free(record.text); alloc.free(record.placeholder); } self.records.deinit(alloc); self.* = undefined; }};
/// One owner-level decision for both direct and recorded command-output writes./// Prepared canonical buffers remain owned by this value until apply transfers/// them into the transcript block.pub const PreparedCommandOutputMutation = union(enum) { decode, overflow_fragment: usize, count_only: struct { block_index: usize, record_count: usize, }, canonical_batch: PreparedCanonicalBatch,
pub fn deinit(self: *PreparedCommandOutputMutation, alloc: Allocator) void { switch (self.*) { .canonical_batch => |*batch| batch.deinit(alloc), .decode, .overflow_fragment, .count_only => {}, } self.* = undefined; }
pub fn requiresRecordedShadow(self: PreparedCommandOutputMutation) bool { return switch (self) { .decode => true, .overflow_fragment, .count_only, .canonical_batch => false, }; }};
pub fn prepareCommandOutputMutation( shell: anytype, alloc: Allocator, lifecycle_id: ?types.ToolLifecycleId, stream: command_output_content.Stream, text: []const u8, record: bool,) !PreparedCommandOutputMutation { const block_index = shell.command_output_display.open_command_block orelse return .decode; const block = &shell.command_output_blocks.items[block_index]; if (!sameLifecycleId(block.lifecycle_id, lifecycle_id)) { return error.CommandOutputLifecycleMismatch; }
const stream_index = commandStreamIndex(stream); if (record and block.overflow_open_records[stream_index] and block.decoders[stream_index].isIdle() and std.mem.indexOfAny(u8, text, "\r\n\x1b") == null) { return .{ .overflow_fragment = block_index }; }
if (record and block.retention_overflow and block.open_line_indices[stream_index] == null and !block.overflow_open_records[stream_index] and text.len > 0 and text[text.len - 1] == '\n' and isCountOnlyCommandOutput(text)) { const record_count = std.mem.count(u8, text, "\n"); if (record_count > 0) { return .{ .count_only = .{ .block_index = block_index, .record_count = record_count, } }; } }
if (!record or block.total_lines < compact_output_row_limit + 1 or block.open_line_indices[stream_index] != null or block.overflow_open_records[stream_index]) { return .decode; }
var canonical: command_output_content.CanonicalOutput = .{}; defer canonical.deinit(alloc); try canonical.append( alloc, switch (stream) { .stdout => .stdout, .stderr => .stderr, }, text, ); if (canonical.records.items.len == 0) return .decode; for (canonical.records.items) |canonical_record| { if (!canonical_record.terminated) return .decode; }
const cap = commandOutputRetentionCap(shell); var retained = retainedCommandOutputBytes(shell, block_index); var retained_count: usize = 0; if (!block.retention_overflow) { for (canonical.records.items) |canonical_record| { const footprint = commandOutputLineRetainedBytes( canonical_record.text.items.len, ); if (retained > cap or footprint > cap - retained) break; retained += footprint; retained_count += 1; } }
var batch = PreparedCanonicalBatch{ .block_index = block_index, .stream = stream, .total_record_count = canonical.records.items.len, .retained_bytes_after = retained, }; errdefer batch.deinit(alloc); try batch.records.ensureTotalCapacityPrecise(alloc, retained_count); for (canonical.records.items[0..retained_count]) |canonical_record| { const owned_text = try alloc.dupe(u8, canonical_record.text.items); errdefer alloc.free(owned_text); const placeholder = try alloc.alloc(u8, 0); batch.records.appendAssumeCapacity(.{ .text = owned_text, .placeholder = placeholder, }); } return .{ .canonical_batch = batch };}
fn isCountOnlyCommandOutput(text: []const u8) bool { for (text) |byte| { if (byte == '\n' or byte == '\t' or (byte >= 0x20 and byte < 0x7f)) continue; return false; } return true;}
pub fn applyPreparedCommandOutputMutation( shell: anytype, alloc: Allocator, metrics: *Metrics, styles: Styles, lifecycle_id: ?types.ToolLifecycleId, stream: command_output_content.Stream, text: []const u8, record: bool, mutation: *PreparedCommandOutputMutation,) !?u32 { return applyPreparedCommandOutputMutationAt( shell, alloc, metrics, styles, lifecycle_id, stream, text, record, mutation, null, );}
fn applyPreparedCommandOutputMutationAt( shell: anytype, alloc: Allocator, metrics: *Metrics, styles: Styles, lifecycle_id: ?types.ToolLifecycleId, stream: command_output_content.Stream, text: []const u8, record: bool, mutation: *PreparedCommandOutputMutation, created_at_ms: ?i64,) !?u32 { return switch (mutation.*) { .decode => applyDecodedCommandOutputMutation( shell, alloc, metrics, styles, lifecycle_id, stream, text, record, created_at_ms, ), .overflow_fragment => |block_index| blk: { std.debug.assert(block_index < shell.command_output_blocks.items.len); shell.command_output_blocks.items[block_index] .overflow_record_visible[commandStreamIndex(stream)] = true; requestTranscriptPaint( shell, commandBlockDirtyEntryId(shell.command_output_blocks.items[block_index]), ); break :blk null; }, .count_only => |prepared| blk: { std.debug.assert(prepared.block_index < shell.command_output_blocks.items.len); shell.command_output_blocks.items[prepared.block_index].total_lines +|= prepared.record_count; requestTranscriptPaint( shell, commandBlockDirtyEntryId(shell.command_output_blocks.items[prepared.block_index]), ); break :blk null; }, .canonical_batch => |*batch| applyCanonicalCommandOutputBatch( shell, alloc, styles, batch, created_at_ms, ), };}
fn applyDecodedCommandOutputMutation( shell: anytype, alloc: Allocator, metrics: *Metrics, styles: Styles, lifecycle_id: ?types.ToolLifecycleId, stream: command_output_content.Stream, text: []const u8, record: bool, created_at_ms: ?i64,) !?u32 { setCommandOutputRenderPolicy(shell, styles);
const command_block_index = try ensureOpenCommandOutputBlock(shell, alloc, lifecycle_id); const Shell = @TypeOf(shell.*); var sink = CommandOutputRecordSink(Shell){ .shell = shell, .alloc = alloc, .block_index = command_block_index, .stream = stream, .record = record, .created_at_ms = created_at_ms, }; defer sink.pending_bytes.deinit(alloc); const content_stream: command_output_content.Stream = switch (stream) { .stdout => .stdout, .stderr => .stderr, }; try sink.beginRecord(); try shell.command_output_blocks.items[command_block_index] .decoders[streamIndex(content_stream)] .append(text, &sink); try sink.flushPending(); _ = metrics; requestTranscriptPaint( shell, sink.first_entry_id orelse commandBlockDirtyEntryId( shell.command_output_blocks.items[command_block_index], ), ); return sink.first_entry_id;}
fn applyCanonicalCommandOutputBatch( shell: anytype, alloc: Allocator, styles: Styles, batch: *PreparedCanonicalBatch, created_at_ms: ?i64,) !?u32 { const retained_count = batch.records.items.len; try shell.command_output_blocks.items[batch.block_index] .lines.ensureUnusedCapacity(alloc, retained_count); try shell.command_output_blocks.items[batch.block_index] .live_entry_ids.ensureUnusedCapacity(alloc, retained_count); try shell.entries.ensureUnusedCapacity(alloc, retained_count);
setCommandOutputRenderPolicy(shell, styles); var block = &shell.command_output_blocks.items[batch.block_index]; var first_entry_id: ?u32 = null; const first_record_ordinal = block.total_lines; for (batch.records.items, 0..) |prepared_record, record_index| { const entry_id = shell.next_entry_id; shell.next_entry_id +%= 1; shell.entries.appendAssumeCapacity(.{ .raw_bytes = .{ .id = entry_id, .created_at_ms = created_at_ms orelse io_mod.milliTimestamp(), .bytes = prepared_record.placeholder, .class = .command_output, } }); block.lines.appendAssumeCapacity(.{ .stream = batch.stream, .text = prepared_record.text, .record_ordinal = first_record_ordinal +| record_index, .entry_id = entry_id, .terminated = true, }); block.live_entry_ids.appendAssumeCapacity(entry_id); block.retained_text_bytes +|= prepared_record.text.len; if (first_entry_id == null) first_entry_id = entry_id; } batch.records.clearRetainingCapacity();
const dropped_count = batch.total_record_count - retained_count; block.total_lines +|= batch.total_record_count; if (dropped_count > 0 and !block.retention_overflow) { block.retention_overflow = true; block.overflow_line_index = block.lines.items.len; debug_trace.logf( "command_output", "command output retention cap reached retained={d} cap={d}; subsequent records count only", .{ batch.retained_bytes_after, commandOutputRetentionCap(shell) }, ); } requestTranscriptPaint( shell, first_entry_id orelse commandBlockDirtyEntryId(block.*), ); return first_entry_id;}
pub fn writeCommandOutputChunk(shell: anytype, alloc: Allocator, metrics: *Metrics, styles: Styles, stream: command_output_content.Stream, text: []const u8, record: bool) !void { return writeCommandOutputChunkForLifecycle( shell, alloc, metrics, styles, null, stream, text, record, );}
pub fn writeCommandOutputChunkForLifecycle( shell: anytype, alloc: Allocator, metrics: *Metrics, styles: Styles, lifecycle_id: ?types.ToolLifecycleId, stream: command_output_content.Stream, text: []const u8, record: bool,) !void { if (text.len == 0) return; const Runtime = @TypeOf(shell.*); if (record and comptime @hasDecl(Runtime, "writeRecordedCommandOutputChunkAtomic")) { const entry_id = try shell.writeRecordedCommandOutputChunkAtomic( alloc, metrics, styles, lifecycle_id, stream, text, ); if (entry_id != null and comptime @hasDecl(Runtime, "forgetShimmer")) { shell.forgetShimmer(); } return; }
_ = try writeCommandOutputChunkUncommitted( shell, alloc, metrics, styles, lifecycle_id, stream, text, record, );}
pub fn writeCommandOutputChunkUncommitted( shell: anytype, alloc: Allocator, metrics: *Metrics, styles: Styles, lifecycle_id: ?types.ToolLifecycleId, stream: command_output_content.Stream, text: []const u8, record: bool,) !?u32 { return writeCommandOutputChunkAt( shell, alloc, metrics, styles, lifecycle_id, stream, text, record, null, );}
fn writeCommandOutputChunkAt( shell: anytype, alloc: Allocator, metrics: *Metrics, styles: Styles, lifecycle_id: ?types.ToolLifecycleId, stream: command_output_content.Stream, text: []const u8, record: bool, created_at_ms: ?i64,) !?u32 { var mutation = try prepareCommandOutputMutation( shell, alloc, lifecycle_id, stream, text, record, ); defer mutation.deinit(alloc); return applyPreparedCommandOutputMutationAt( shell, alloc, metrics, styles, lifecycle_id, stream, text, record, &mutation, created_at_ms, );}
pub fn writeCommandOutputChunkDetached( shell: anytype, alloc: Allocator, metrics: *Metrics, styles: Styles, lifecycle_id: ?types.ToolLifecycleId, stream: command_output_content.Stream, text: []const u8, record: bool, created_at_ms: i64,) !?u32 { return writeCommandOutputChunkAt( shell, alloc, metrics, styles, lifecycle_id, stream, text, record, created_at_ms, );}
pub fn flushCommandOutputSummary(shell: anytype, alloc: Allocator, metrics: *Metrics, styles: Styles, record: bool) !void { return flushCommandOutputSummaryForLifecycle( shell, alloc, metrics, styles, null, record, );}
pub fn flushCommandOutputSummaryForLifecycle( shell: anytype, alloc: Allocator, metrics: *Metrics, styles: Styles, lifecycle_id: ?types.ToolLifecycleId, record: bool,) !void { const Runtime = @TypeOf(shell.*); if (record and comptime @hasDecl(Runtime, "flushRecordedCommandOutputSummaryAtomic")) { if (hasMatchingOpenCommandOutputBlock(shell, lifecycle_id)) { return shell.flushRecordedCommandOutputSummaryAtomic( alloc, metrics, styles, lifecycle_id, ); } }
_ = try flushCommandOutputSummaryUncommitted( shell, alloc, metrics, styles, lifecycle_id, record, );}
fn hasMatchingOpenCommandOutputBlock( shell: anytype, lifecycle_id: ?types.ToolLifecycleId,) bool { const index = shell.command_output_display.open_command_block orelse return false; return sameLifecycleId( shell.command_output_blocks.items[index].lifecycle_id, lifecycle_id, );}
pub fn openCommandOutputLifecycleId( shell: anytype,) ?types.ToolLifecycleId { const index = shell.command_output_display.open_command_block orelse return null; if (index >= shell.command_output_blocks.items.len) return null; return shell.command_output_blocks.items[index].lifecycle_id;}
pub fn flushCommandOutputSummaryUncommitted( shell: anytype, alloc: Allocator, metrics: *Metrics, styles: Styles, lifecycle_id: ?types.ToolLifecycleId, record: bool,) !bool { _ = metrics; setCommandOutputRenderPolicy(shell, styles);
var retention_changed = false; if (shell.command_output_display.open_command_block) |block_index| { const open_block = &shell.command_output_blocks.items[block_index]; if (!sameLifecycleId(open_block.lifecycle_id, lifecycle_id)) { debug_trace.logf("command_output", "ignoring command output completion for mismatched lifecycle", .{}); return false; } try finishCommandOutputBlock( shell, alloc, block_index, record, null, ); if (record) { // Completion makes the block pruneable; retention must not treat // a terminal count-only block as still active. shell.command_output_display.open_command_block = null; retention_changed = try consolidateCommandOutputBlock( shell, alloc, block_index, ); } else { var block = shell.command_output_blocks.orderedRemove(block_index); block.deinit(alloc); } } shell.command_output_display = .{}; return retention_changed;}
/// Finish one detached historical command block without rebuilding or/// retaining the growing transcript. A resume projection synchronizes all/// command entries once during finalization.pub fn flushCommandOutputSummaryDetached( shell: anytype, alloc: Allocator, styles: Styles, lifecycle_id: ?types.ToolLifecycleId, created_at_ms: i64,) !void { setCommandOutputRenderPolicy(shell, styles); const block_index = shell.command_output_display.open_command_block orelse { shell.command_output_display = .{}; return; }; const open_block = &shell.command_output_blocks.items[block_index]; if (!sameLifecycleId(open_block.lifecycle_id, lifecycle_id)) { return error.CommandOutputLifecycleMismatch; } try finishCommandOutputBlock(shell, alloc, block_index, true, created_at_ms); shell.command_output_display.open_command_block = null; try sealCommandOutputBlock(shell, alloc, block_index); shell.command_output_display = .{};}
fn finishCommandOutputBlock( shell: anytype, alloc: Allocator, block_index: usize, record: bool, created_at_ms: ?i64,) !void { const Shell = @TypeOf(shell.*); inline for ([_]command_output_content.Stream{ .stdout, .stderr }) |stream| { var sink = CommandOutputRecordSink(Shell){ .shell = shell, .alloc = alloc, .block_index = block_index, .stream = stream, .record = record, .created_at_ms = created_at_ms, }; defer sink.pending_bytes.deinit(alloc); const content_stream: command_output_content.Stream = switch (stream) { .stdout => .stdout, .stderr => .stderr, }; try shell.command_output_blocks.items[block_index] .decoders[streamIndex(content_stream)] .finish(&sink); try sink.flushPending(); const stream_index = commandStreamIndex(stream); try discardEmptyProvisionalRecord( shell, alloc, block_index, stream_index, ); var block = &shell.command_output_blocks.items[block_index]; block.open_line_indices[stream_index] = null; if (block.overflow_open_records[stream_index] and !block.overflow_record_visible[stream_index]) { block.total_lines -|= 1; } block.overflow_open_records[stream_index] = false; block.overflow_record_visible[stream_index] = false; }}
fn discardEmptyProvisionalRecord( shell: anytype, alloc: Allocator, block_index: usize, stream_index: usize,) !void { var block = &shell.command_output_blocks.items[block_index]; const line_index = block.open_line_indices[stream_index] orelse return; const line = block.lines.items[line_index]; if (line.visible or line.terminated or line.text.len > 0) return;
if (line.entry_id) |entry_id| { const ids = [_]u32{entry_id}; removeRawEntriesByIds(shell, alloc, &ids); removeEntryId(&block.live_entry_ids, entry_id); removeEntryId(&block.source_entry_ids, entry_id); } alloc.free(line.text); _ = block.lines.orderedRemove(line_index); block.total_lines -|= 1; for (&block.open_line_indices) |*open_index| { if (open_index.*) |open| { if (open == line_index) { open_index.* = null; } else if (open > line_index) { open_index.* = open - 1; } } } if (block.overflow_line_index) |overflow_index| { block.overflow_line_index = if (overflow_index == line_index) null else if (overflow_index > line_index) overflow_index - 1 else overflow_index; }}
fn removeEntryId(ids: *std.ArrayList(u32), entry_id: u32) void { for (ids.items, 0..) |candidate, index| { if (candidate != entry_id) continue; _ = ids.orderedRemove(index); return; }}
pub fn trimRetainedCommandOutputLine( shell: anytype, alloc: Allocator, block_index: usize, line_index: usize,) !bool { var block = &shell.command_output_blocks.items[block_index]; for (block.open_line_indices) |open_index| { if (open_index == line_index) return false; } const line = block.lines.items[line_index]; const entry_id = line.entry_id; var empty_anchor_bytes: ?[]u8 = null; errdefer if (empty_anchor_bytes) |bytes| alloc.free(bytes); if (entry_id != null and rawEntryIndex(shell, entry_id.?) != null) { try block.pruned_ranges.ensureUnusedCapacity(alloc, 1); empty_anchor_bytes = try alloc.alloc(u8, 0); }
std.debug.assert(block.retained_text_bytes >= line.text.len); block.retained_text_bytes -= line.text.len; alloc.free(line.text); _ = block.lines.orderedRemove(line_index); for (&block.open_line_indices) |*open_index| { if (open_index.*) |open| { if (open > line_index) open_index.* = open - 1; } } if (entry_id) |id| { removeEntryId(&block.live_entry_ids, id); removeEntryId(&block.source_entry_ids, id); if (empty_anchor_bytes) |bytes| { const entry_index = rawEntryIndex(shell, id).?; var raw = &shell.entries.items[entry_index].raw_bytes; alloc.free(raw.bytes); raw.bytes = bytes; raw.class = .command_output; empty_anchor_bytes = null; block.pruned_ranges.appendAssumeCapacity(.{ .anchor_entry_id = id, .start_record = line.record_ordinal, .end_record = line.record_ordinal +| 1, }); } } _ = coalesceCommandOutputPrunedRanges(shell, alloc, block_index); block.retention_overflow = true; block.overflow_line_index = if (block.overflow_line_index) |overflow_index| @min(overflow_index, line_index) else line_index; return true;}
fn ensureOpenCommandOutputBlock( shell: anytype, alloc: Allocator, lifecycle_id: ?types.ToolLifecycleId,) !usize { if (shell.command_output_display.open_command_block) |index| { const block = &shell.command_output_blocks.items[index]; if (!sameLifecycleId(block.lifecycle_id, lifecycle_id)) { debug_trace.logf("command_output", "refusing multiplexed command output block", .{}); return error.CommandOutputLifecycleMismatch; } return index; } if (lifecycle_id != null) { var index = shell.command_output_blocks.items.len; while (index > 0) { index -= 1; const block = &shell.command_output_blocks.items[index]; if (block.entry_id == null or !sameLifecycleId(block.lifecycle_id, lifecycle_id)) continue; shell.command_output_display.open_command_block = index; debug_trace.logf( "command_output", "reopening completed command output block for late lifecycle output", .{}, ); return index; } } const owned_lifecycle_id = try dupeLifecycleId(alloc, lifecycle_id); errdefer if (owned_lifecycle_id) |id| alloc.free(@constCast(id.call_id)); try shell.command_output_blocks.append(alloc, .{ .lifecycle_id = owned_lifecycle_id }); const index = shell.command_output_blocks.items.len - 1; shell.command_output_display.open_command_block = index; return index;}
fn CommandOutputRecordSink(comptime Shell: type) type { return struct { shell: *Shell, alloc: Allocator, block_index: usize, stream: command_output_content.Stream, record: bool, created_at_ms: ?i64, first_entry_id: ?u32 = null, pending_line_index: ?usize = null, pending_bytes: std.ArrayList(u8) = .empty,
const Self = @This(); const RecordTarget = union(enum) { retained: usize, dropped, };
pub fn appendText(self: *Self, bytes: []const u8) !void { if (bytes.len == 0) return; const target = try self.ensureOpenRecord(); switch (target) { .dropped => { self.shell.command_output_blocks.items[self.block_index] .overflow_record_visible[commandStreamIndex(self.stream)] = true; return; }, .retained => |line_index| { var block = &self.shell.command_output_blocks.items[self.block_index]; const stream_index = commandStreamIndex(self.stream); block.lines.items[line_index].visible = true; if (block.overflow_open_records[stream_index]) return; if (self.pending_line_index != null and self.pending_line_index.? != line_index) { try self.flushPending(); } self.pending_line_index = line_index; const pending_len = try std.math.add( usize, self.pending_bytes.items.len, bytes.len, ); if (!self.canRetain(pending_len)) { try self.flushPending(); self.traceOverflowTransition(block.retention_overflow); block.retention_overflow = true; block.overflow_line_index = if (block.overflow_line_index) |index| @min(index, line_index) else line_index; block.overflow_open_records[stream_index] = true; return; } try self.pending_bytes.appendSlice(self.alloc, bytes); }, } }
pub fn finishLine(self: *Self) !void { const target = try self.ensureOpenRecord(); const stream_index = commandStreamIndex(self.stream); try self.flushPending(); switch (target) { .retained => |line_index| { const line = &self.shell.command_output_blocks.items[self.block_index] .lines.items[line_index]; line.visible = true; line.terminated = true; }, .dropped => { self.shell.command_output_blocks.items[self.block_index] .overflow_record_visible[stream_index] = true; }, } var block = &self.shell.command_output_blocks.items[self.block_index]; block.open_line_indices[stream_index] = null; block.overflow_open_records[stream_index] = false; block.overflow_record_visible[stream_index] = false; }
pub fn replaceLine(self: *Self) !void { const stream_index = commandStreamIndex(self.stream); var block = &self.shell.command_output_blocks.items[self.block_index]; const line_index = block.open_line_indices[stream_index] orelse { // A descriptor-capped record has no retained line to clear, // but it is still the same logical record after a bare CR. // Keep the open marker so the replacement bytes do not count // a second record. block.overflow_record_visible[stream_index] = false; return; }; if (self.pending_line_index == line_index) { self.pending_bytes.clearRetainingCapacity(); self.pending_line_index = null; } else { try self.flushPending(); } const old_text = block.lines.items[line_index].text; const replacement = try self.alloc.alloc(u8, 0); block.lines.items[line_index].text = replacement; self.alloc.free(old_text); block.lines.items[line_index].terminated = false; block.retained_text_bytes -|= old_text.len; block.overflow_open_records[stream_index] = false; block.overflow_record_visible[stream_index] = false; if (block.overflow_line_index == line_index and block.total_lines == block.lines.items.len) { block.overflow_line_index = null; block.retention_overflow = false; } }
fn ensureOpenRecord(self: *Self) !RecordTarget { const stream_index = commandStreamIndex(self.stream); var block = &self.shell.command_output_blocks.items[self.block_index]; if (block.open_line_indices[stream_index]) |line_index| { return .{ .retained = line_index }; } if (block.overflow_open_records[stream_index]) return .dropped;
const record_ordinal = block.total_lines; block.total_lines = try std.math.add(usize, block.total_lines, 1); const entry_descriptor_bytes: usize = if (self.record) command_output_entry_descriptor_bytes +| command_output_source_id_descriptor_bytes else 0; const descriptor_bytes = command_output_line_descriptor_bytes +| entry_descriptor_bytes; if (!self.canRetain(descriptor_bytes)) { self.traceOverflowTransition(block.retention_overflow); block.retention_overflow = true; if (block.overflow_line_index == null) { block.overflow_line_index = block.lines.items.len; } block.overflow_open_records[stream_index] = true; block.overflow_record_visible[stream_index] = false; return .dropped; }
var entry_id: ?u32 = null; if (self.record) { const placeholder = try self.alloc.alloc(u8, 0); var placeholder_owned = true; errdefer if (placeholder_owned) self.alloc.free(placeholder); entry_id = if (self.created_at_ms) |created_at_ms| try self.shell.appendRawBytesEntryClassifiedAt( self.alloc, placeholder, .command_output, created_at_ms, ) else try self.shell.appendRawBytesEntryClassified( self.alloc, placeholder, .command_output, ); placeholder_owned = false; try block.live_entry_ids.append(self.alloc, entry_id.?); if (self.first_entry_id == null) self.first_entry_id = entry_id; }
const line_text = try self.alloc.alloc(u8, 0); var line_text_owned = true; errdefer if (line_text_owned) self.alloc.free(line_text); try block.lines.append(self.alloc, .{ .stream = self.stream, .text = line_text, .record_ordinal = record_ordinal, .entry_id = entry_id, .visible = false, }); line_text_owned = false; const line_index = block.lines.items.len - 1; block.open_line_indices[stream_index] = line_index; return .{ .retained = line_index }; }
fn beginRecord(self: *Self) !void { _ = try self.ensureOpenRecord(); }
fn flushPending(self: *Self) !void { const line_index = self.pending_line_index orelse return; defer { self.pending_bytes.clearRetainingCapacity(); self.pending_line_index = null; } if (self.pending_bytes.items.len == 0) return; var block = &self.shell.command_output_blocks.items[self.block_index]; const old_text = block.lines.items[line_index].text; const replacement = try self.alloc.alloc( u8, try std.math.add(usize, old_text.len, self.pending_bytes.items.len), ); @memcpy(replacement[0..old_text.len], old_text); @memcpy(replacement[old_text.len..], self.pending_bytes.items); self.alloc.free(old_text); block.lines.items[line_index].text = replacement; block.retained_text_bytes = try std.math.add( usize, block.retained_text_bytes, self.pending_bytes.items.len, ); }
fn canRetain(self: *Self, additional_bytes: usize) bool { const cap = commandOutputRetentionCap(self.shell); const retained = retainedCommandOutputBytes(self.shell, self.block_index); return retained <= cap and additional_bytes <= cap - retained; }
fn traceOverflowTransition(self: *Self, already_overflowed: bool) void { if (already_overflowed) return; const cap = commandOutputRetentionCap(self.shell); const retained = retainedCommandOutputBytes(self.shell, self.block_index); debug_trace.logf( "command_output", "command output retention cap reached retained={d} cap={d}; subsequent records count only", .{ retained, cap }, ); } };}
fn commandOutputRetentionCap(shell: anytype) usize { const Shell = @TypeOf(shell.*); return if (comptime @hasField(Shell, "max_retained_transcript_bytes")) shell.max_retained_transcript_bytes else std.math.maxInt(usize);}
fn retainedCommandOutputBytes(shell: anytype, block_index: usize) usize { if (commandOutputRetentionCap(shell) == std.math.maxInt(usize)) return 0; const Shell = @TypeOf(shell.*); return if (comptime @hasDecl(Shell, "retainedStructuredBytesForCommandOutput")) shell.retainedStructuredBytesForCommandOutput() else commandOutputBlockRetainedBytes(shell.command_output_blocks.items[block_index]);}
test "unbounded command output admission does not scan retained state" { const CountingShell = struct { max_retained_transcript_bytes: usize = std.math.maxInt(usize), command_output_blocks: std.ArrayList(CommandOutputBlock) = .empty, retained_scan_count: usize = 0,
fn retainedStructuredBytesForCommandOutput(self: *@This()) usize { self.retained_scan_count += 1; return 123; } };
var shell: CountingShell = .{}; defer shell.command_output_blocks.deinit(std.testing.allocator); try shell.command_output_blocks.append(std.testing.allocator, .{});
try std.testing.expectEqual(@as(usize, 0), retainedCommandOutputBytes(&shell, 0)); try std.testing.expectEqual(@as(usize, 0), shell.retained_scan_count);}
fn commandStreamIndex(stream: command_output_content.Stream) usize { return switch (stream) { .stdout => 0, .stderr => 1, };}
fn streamIndex(stream: command_output_content.Stream) usize { return switch (stream) { .stdout => 0, .stderr => 1, };}
pub fn sameLifecycleId( lhs: ?types.ToolLifecycleId, rhs: ?types.ToolLifecycleId,) bool { if (lhs) |left| { const right = rhs orelse return false; return left.turn_id == right.turn_id and std.mem.eql(u8, left.call_id, right.call_id); } return rhs == null;}
fn dupeLifecycleId( alloc: Allocator, lifecycle_id: ?types.ToolLifecycleId,) !?types.ToolLifecycleId { const id = lifecycle_id orelse return null; return .{ .turn_id = id.turn_id, .call_id = try alloc.dupe(u8, id.call_id), };}
fn consolidateCommandOutputBlock( shell: anytype, alloc: Allocator, index: usize,) !bool { try shell.assertCanMutateTranscript();
try sealCommandOutputBlock(shell, alloc, index);
_ = try syncCommandOutputBlockEntries(shell, alloc);
if (comptime @hasDecl(@TypeOf(shell.*), "rebuildTranscriptCacheAfterStructuredRewrite")) { try shell.rebuildTranscriptCacheAfterStructuredRewrite( alloc, "command output consolidation", ); } else { try shell.rebuildTranscriptCacheFromEntries(alloc, "command output consolidation"); } shell.recomputeCursorFromTranscript(); requestTranscriptPaint(shell, null); if (comptime @hasDecl(@TypeOf(shell.*), "enforceStructuredRetentionAndReport")) { return shell.enforceStructuredRetentionAndReport(alloc, shell.command_output_blocks.items[index].entry_id); } try shell.enforceStructuredRetention(alloc, shell.command_output_blocks.items[index].entry_id); return false;}
fn sealCommandOutputBlock( shell: anytype, alloc: Allocator, index: usize,) !void { var block = &shell.command_output_blocks.items[index]; try block.source_entry_ids.appendSlice(alloc, block.live_entry_ids.items); block.live_entry_ids.clearRetainingCapacity(); var entry_id: ?u32 = null; for (block.source_entry_ids.items) |source_entry_id| { if (rawEntryIndex(shell, source_entry_id) == null) continue; entry_id = source_entry_id; break; } block.entry_id = entry_id; if (entry_id) |id| { if (comptime @hasDecl(@TypeOf(shell.*), "attachCommandOutputEntryForLifecycle")) { shell.attachCommandOutputEntryForLifecycle(block.lifecycle_id, id); } } if (entry_id) |retained_entry_id| { if (comptime @hasDecl(@TypeOf(shell.*), "fullTranscriptAnchorEntryId") and @hasDecl(@TypeOf(shell.*), "retargetFullTranscriptAnchor")) { if (shell.fullTranscriptAnchorEntryId()) |full_anchor_entry_id| { if (containsEntryId(block.source_entry_ids.items, full_anchor_entry_id) and rawEntryIndex(shell, full_anchor_entry_id) == null) { shell.retargetFullTranscriptAnchor(retained_entry_id); } } } }}
fn rawEntryIndex(shell: anytype, id: u32) ?usize { for (shell.entries.items, 0..) |entry, index| { if (entry == .raw_bytes and entry.raw_bytes.id == id) return index; } return null;}
fn removeRawEntriesByIds(shell: anytype, alloc: Allocator, ids: []const u32) void { if (ids.len == 0) return;
var i: usize = 0; while (i < shell.entries.items.len) { const entry = shell.entries.items[i]; if (entry == .raw_bytes and containsEntryId(ids, entry.raw_bytes.id)) { var removed = shell.entries.orderedRemove(i); removed.deinit(alloc); shell.replaceable_last_line = false; shell.replaceable_start = 0; continue; } i += 1; }}
fn containsEntryId(ids: []const u32, id: u32) bool { for (ids) |candidate| { if (candidate == id) return true; } return false;}
pub fn isPrunedRangeAnchor(block: CommandOutputBlock, entry_id: u32) bool { for (block.pruned_ranges.items) |range| { if (range.anchor_entry_id == entry_id) return true; } return false;}
pub fn commandBlockOwnsEntry(block: CommandOutputBlock, entry_id: u32) bool { return block.entry_id == entry_id or isPrunedRangeAnchor(block, entry_id) or containsEntryId(block.live_entry_ids.items, entry_id) or containsEntryId(block.source_entry_ids.items, entry_id);}
fn commandBlockOwnsSourcePosition(block: CommandOutputBlock, entry_id: u32) bool { if (commandBlockOwnsEntry(block, entry_id)) return true; for (block.lines.items) |line| { if (line.entry_id == entry_id) return true; } return false;}
fn commandEntriesShareRun( shell: anytype, block: CommandOutputBlock, lhs_entry_id: u32, rhs_entry_id: u32,) bool { const lhs_index = rawEntryIndex(shell, lhs_entry_id) orelse return false; const rhs_index = rawEntryIndex(shell, rhs_entry_id) orelse return false; const start = @min(lhs_index, rhs_index); const end = @max(lhs_index, rhs_index); for (shell.entries.items[start + 1 .. end]) |entry| { if (!commandBlockOwnsSourcePosition(block, entry.id())) return false; } return true;}
fn retargetCommandOutputEntryIdentity( shell: anytype, block_index: usize, removed_entry_id: u32, retained_entry_id: u32,) void { var block = &shell.command_output_blocks.items[block_index]; if (block.entry_id == removed_entry_id) block.entry_id = retained_entry_id; const Shell = @TypeOf(shell.*); if (comptime @hasField(Shell, "tool_details")) { for (shell.tool_details.items) |*detail| { if (detail.command_output_entry_id == removed_entry_id) { detail.command_output_entry_id = retained_entry_id; } } } if (comptime @hasDecl(Shell, "fullTranscriptAnchorEntryId") and @hasDecl(Shell, "retargetFullTranscriptAnchor")) { if (shell.fullTranscriptAnchorEntryId() == removed_entry_id) { shell.retargetFullTranscriptAnchor(retained_entry_id); } }}
pub fn coalesceCommandOutputPrunedRanges( shell: anytype, alloc: Allocator, block_index: usize,) bool { var changed = false; var left_index: usize = 0; while (left_index < shell.command_output_blocks.items[block_index].pruned_ranges.items.len) { var right_index = left_index + 1; while (right_index < shell.command_output_blocks.items[block_index].pruned_ranges.items.len) { const block = shell.command_output_blocks.items[block_index]; const left = block.pruned_ranges.items[left_index]; const right = block.pruned_ranges.items[right_index]; const ordinal_adjacent = left.end_record == right.start_record or right.end_record == left.start_record; if (!ordinal_adjacent or !commandEntriesShareRun( shell, block, left.anchor_entry_id, right.anchor_entry_id, )) { right_index += 1; continue; }
const keep_right = block.entry_id == right.anchor_entry_id and block.entry_id != left.anchor_entry_id; const retained_entry_id = if (keep_right) right.anchor_entry_id else left.anchor_entry_id; const removed_entry_id = if (keep_right) left.anchor_entry_id else right.anchor_entry_id; const merged_start = @min(left.start_record, right.start_record); const merged_end = @max(left.end_record, right.end_record);
var mutable_block = &shell.command_output_blocks.items[block_index]; mutable_block.pruned_ranges.items[left_index] = .{ .anchor_entry_id = retained_entry_id, .start_record = merged_start, .end_record = merged_end, }; _ = mutable_block.pruned_ranges.orderedRemove(right_index); const ids = [_]u32{removed_entry_id}; removeRawEntriesByIds(shell, alloc, &ids); retargetCommandOutputEntryIdentity( shell, block_index, removed_entry_id, retained_entry_id, ); changed = true; } left_index += 1; } return changed;}
const CompactLinePlan = struct { visible_rows: usize = 0, hidden: bool = false,};
/// Builds the block-wide compact command projection for the active width./// Row admission is physical rather than callback/logical-line based, with at/// most five rows reserved for command output and its process presentation.pub fn renderCompactCommandOutput( alloc: Allocator, block: CommandOutputBlock, policy: CommandOutputRenderPolicy, cols: u16,) !CommandOutputProjection { return renderCompactCommandOutputWithProcessPresentation( alloc, block, policy, cols, null, );}
pub fn renderCompactCommandOutputWithProcessPresentation( alloc: Allocator, block: CommandOutputBlock, policy: CommandOutputRenderPolicy, cols: u16, process_presentation: ?types.CommandProcessPresentation,) !CommandOutputProjection { var projection: CommandOutputProjection = .{}; errdefer projection.deinit(alloc);
const plans = try alloc.alloc(CompactLinePlan, block.lines.items.len); defer alloc.free(plans); @memset(plans, .{});
var remaining_rows: usize = if (cols == 0) 0 else compact_output_row_limit -| @intFromBool(process_presentation != null); var hidden_records = block.total_lines -| block.lines.items.len; const final_position = finalCommandOutputPosition(block);
if (cols > 0) { for (block.lines.items, 0..) |line, index| { if (!line.visible) continue; if (remaining_rows == 0) { plans[index].hidden = true; hidden_records += 1; continue; } var prefix = try assistant_wrap.wrapLiteralCommandOutputPrefix( alloc, line.text, cols, remaining_rows, ); defer prefix.deinit(alloc); const row_count = hardLineCount(prefix.bytes); plans[index].visible_rows = row_count; remaining_rows -|= plans[index].visible_rows; const retention_prefix_incomplete = block.retention_overflow and block.overflow_line_index == index; plans[index].hidden = prefix.has_more or retention_prefix_incomplete; if (plans[index].hidden) { hidden_records += 1; } } } const projection_enabled = cols > 0; const terminal_hidden_records = if (projection_enabled) hidden_records else 0; const terminal_process = if (projection_enabled) process_presentation else null;
for (block.lines.items, 0..) |line, index| { const entry_id = commandOutputLineEntryId(block, index) orelse continue; const final_line = if (final_position) |position| position == .line and position.line == index else false; const has_content = plans[index].visible_rows > 0 or (final_line and (terminal_hidden_records > 0 or terminal_process != null)); if (has_content and projection.bytes.items.len > 0) { try projection.bytes.append(alloc, '\n'); } const byte_start = projection.bytes.items.len;
if (plans[index].visible_rows > 0) { var prefix = try assistant_wrap.wrapLiteralCommandOutputPrefix( alloc, line.text, cols, plans[index].visible_rows, ); defer prefix.deinit(alloc); try appendDimmedCommandRows( &projection.bytes, alloc, policy.styles, prefix.bytes, ); } if (final_line) { try appendCompactTerminalRows( &projection.bytes, alloc, policy.styles, cols, byte_start, terminal_process, terminal_hidden_records, ); }
try projection.entries.append(alloc, .{ .entry_id = entry_id, .byte_start = byte_start, .byte_end = projection.bytes.items.len, }); }
for (block.pruned_ranges.items, 0..) |range, index| { const final_range = if (final_position) |position| position == .pruned_range and position.pruned_range == index else false; const has_content = final_range and (terminal_hidden_records > 0 or terminal_process != null); if (has_content) { if (projection.bytes.items.len > 0) try projection.bytes.append(alloc, '\n'); } const byte_start = projection.bytes.items.len; if (has_content) { try appendCompactTerminalRows( &projection.bytes, alloc, policy.styles, cols, byte_start, terminal_process, terminal_hidden_records, ); } try projection.entries.append(alloc, .{ .entry_id = range.anchor_entry_id, .byte_start = byte_start, .byte_end = projection.bytes.items.len, }); }
return projection;}
const CompactFinalPosition = union(enum) { line: usize, pruned_range: usize,};
fn finalCommandOutputPosition(block: CommandOutputBlock) ?CompactFinalPosition { var best_end: usize = 0; var best: ?CompactFinalPosition = null; for (block.lines.items, 0..) |line, index| { if (commandOutputLineEntryId(block, index) == null) continue; const ordinal = if (index > 0 and line.record_ordinal == 0) index else line.record_ordinal; const record_end = ordinal +| 1; if (best == null or record_end >= best_end) { best_end = record_end; best = .{ .line = index }; } } for (block.pruned_ranges.items, 0..) |range, index| { if (best == null or range.end_record >= best_end) { best_end = range.end_record; best = .{ .pruned_range = index }; } } return best;}
fn appendCompactTerminalRows( out: *std.ArrayList(u8), alloc: Allocator, styles: Styles, cols: u16, entry_start: usize, process_presentation: ?types.CommandProcessPresentation, hidden_records: usize,) !void { if (process_presentation) |presentation| { if (out.items.len > entry_start) try out.append(alloc, '\n'); const status = try processStatusRow(alloc, presentation, cols); defer alloc.free(status); try appendDimmedCommandRows(out, alloc, styles, status); } if (hidden_records > 0) { if (out.items.len > entry_start) try out.append(alloc, '\n'); const hint = try foldedHint(alloc, hidden_records, cols); defer alloc.free(hint); try appendDimmedCommandRows(out, alloc, styles, hint); }}
pub fn processPresentationForBlock( shell: anytype, block: CommandOutputBlock,) ?types.CommandProcessPresentation { const Shell = @TypeOf(shell.*); if (comptime !@hasField(Shell, "tool_details")) return null; for (shell.tool_details.items) |detail| { if (!detail.isCapturedCommand()) continue; if (detail.lifecycle_id != null and block.lifecycle_id != null and sameLifecycleId(detail.lifecycle_id, block.lifecycle_id)) { return detail.command_process_presentation; } if (detail.command_output_entry_id != null and detail.command_output_entry_id == block.entry_id) { return detail.command_process_presentation; } } return null;}
fn commandOutputLineEntryId(block: CommandOutputBlock, index: usize) ?u32 { if (block.lines.items[index].entry_id) |entry_id| return entry_id; if (index < block.source_entry_ids.items.len) return block.source_entry_ids.items[index]; if (index < block.live_entry_ids.items.len) return block.live_entry_ids.items[index]; if (index == 0) return block.entry_id; return null;}
fn hardLineCount(bytes: []const u8) usize { if (bytes.len == 0) return 0; return std.mem.count(u8, bytes, "\n") + 1;}
fn appendDimmedCommandRows( out: *std.ArrayList(u8), alloc: Allocator, styles: Styles, bytes: []const u8,) !void { return appendDimmedCommandRowsWithGutterStyle(out, alloc, styles, bytes, false);}
fn appendDimmedCommandRowsWithPrimaryGutter( out: *std.ArrayList(u8), alloc: Allocator, styles: Styles, bytes: []const u8,) !void { return appendDimmedCommandRowsWithGutterStyle(out, alloc, styles, bytes, true);}
fn appendDimmedCommandRowsWithGutterStyle( out: *std.ArrayList(u8), alloc: Allocator, styles: Styles, bytes: []const u8, primary_gutter: bool,) !void { if (bytes.len == 0) return;
var row_start: usize = 0; while (row_start < bytes.len) { const newline_offset = std.mem.findScalar(u8, bytes[row_start..], '\n'); const row_end = if (newline_offset) |offset| row_start + offset else bytes.len; const row = bytes[row_start..row_end]; if (primary_gutter and std.mem.startsWith(u8, row, "│")) { try out.appendSlice(alloc, styles.reset_style); try out.appendSlice(alloc, "│"); try out.appendSlice(alloc, styles.dim_style); try out.appendSlice(alloc, row["│".len..]); } else { try out.appendSlice(alloc, styles.dim_style); try out.appendSlice(alloc, row); } try out.appendSlice(alloc, styles.reset_style); if (newline_offset == null) break; try out.append(alloc, '\n'); row_start = row_end + 1; }}
test "dimmed command rows frame physical lines independently" { const alloc = std.testing.allocator; const styles = Styles{ .system_notice_label_style = "", .system_notice_text_style = "", .reset_style = "<reset>", .dim_style = "<dim>", .red_style = "", }; var out: std.ArrayList(u8) = .empty; defer out.deinit(alloc);
try appendDimmedCommandRows(&out, alloc, styles, "│ one"); try std.testing.expectEqualStrings("<dim>│ one<reset>", out.items);
out.clearRetainingCapacity(); try appendDimmedCommandRows(&out, alloc, styles, "│ one\n\n│ three\n"); try std.testing.expectEqualStrings( "<dim>│ one<reset>\n" ++ "<dim><reset>\n" ++ "<dim>│ three<reset>\n", out.items, );}
fn foldedHint(alloc: Allocator, hidden_records: usize, cols: u16) ![]u8 { const noun = if (hidden_records == 1) "line" else "lines"; const candidates = [_][]u8{ try std.fmt.allocPrint(alloc, "│ … {d} {s} more (ctrl o to view)", .{ hidden_records, noun }), try std.fmt.allocPrint(alloc, "│ … {d} more (ctrl o)", .{hidden_records}), try std.fmt.allocPrint(alloc, "│ … {d} more", .{hidden_records}), }; defer for (candidates) |candidate| alloc.free(candidate);
for (candidates) |candidate| { if (display_width.visibleWidthIgnoringAnsi(candidate) <= cols) { return alloc.dupe(u8, candidate); } } return alloc.dupe( u8, display_width.prefixByWidthIgnoringAnsi(candidates[candidates.len - 1], cols), );}
fn processStatusRow( alloc: Allocator, presentation: types.CommandProcessPresentation, cols: u16,) ![]u8 { const full = switch (presentation) { .exit_code => |code| try std.fmt.allocPrint(alloc, "│ exit code {d}", .{code}), .signal => |signal| try std.fmt.allocPrint(alloc, "│ signal {d}", .{signal}), }; defer alloc.free(full); return alloc.dupe(u8, display_width.prefixByWidthIgnoringAnsi(full, cols));}
/// Width-aware, uncapped projection for one retained logical command record./// Both streams deliberately share the same neutral style; callers preserve/// stream order separately.pub fn renderFullCommandOutputRecord( alloc: Allocator, styles: Styles, text: []const u8, cols: u16,) ![]u8 { const wrapped = try assistant_wrap.wrapLiteralCommandOutput(alloc, text, cols); defer alloc.free(wrapped);
var out: std.ArrayList(u8) = .empty; errdefer out.deinit(alloc); try appendDimmedCommandRows(&out, alloc, styles, wrapped); try out.append(alloc, '\n'); return out.toOwnedSlice(alloc);}
pub fn renderCommandOutputRecordWithPrimaryGutter( alloc: Allocator, styles: Styles, text: []const u8, cols: u16,) ![]u8 { const wrapped = try assistant_wrap.wrapLiteralCommandOutput(alloc, text, cols); defer alloc.free(wrapped);
var out: std.ArrayList(u8) = .empty; errdefer out.deinit(alloc); try appendDimmedCommandRowsWithPrimaryGutter(&out, alloc, styles, wrapped); try out.append(alloc, '\n'); return out.toOwnedSlice(alloc);}
test "compact and full command output style every wrapped row" { const alloc = std.testing.allocator; const text = "paragraph words\n\n\tvalue"; const styles = Styles{ .system_notice_label_style = "", .system_notice_text_style = "", .reset_style = "<reset>", .dim_style = "<dim>", .red_style = "", }; const expected_rows = "<dim>│ paragraph<reset>\n" ++ "<dim>│ words<reset>\n" ++ "<dim>│ <reset>\n" ++ "<dim>│ value<reset>";
var block: CommandOutputBlock = .{ .total_lines = 1 }; defer block.deinit(alloc); try block.lines.append(alloc, .{ .stream = .stdout, .text = try alloc.dupe(u8, text), .entry_id = 10, .terminated = true, });
var compact = try renderCompactCommandOutput(alloc, block, .{ .styles = styles, }, 16); defer compact.deinit(alloc); try std.testing.expectEqualStrings(expected_rows, compact.bytes.items);
const full = try renderFullCommandOutputRecord(alloc, styles, text, 16); defer alloc.free(full); try std.testing.expectEqualStrings(expected_rows ++ "\n", full);
const primary_gutter = try renderCommandOutputRecordWithPrimaryGutter( alloc, styles, text, 16, ); defer alloc.free(primary_gutter); try std.testing.expectEqualStrings( "<reset>│<dim> paragraph<reset>\n" ++ "<reset>│<dim> words<reset>\n" ++ "<reset>│<dim> <reset>\n" ++ "<reset>│<dim> value<reset>\n", primary_gutter, );}
test "compact command output caps physical rows" { const alloc = std.testing.allocator; var block: CommandOutputBlock = .{}; defer block.deinit(alloc);
for (0..7) |index| { const text = try std.fmt.allocPrint(alloc, "line-{d}", .{index + 1}); try block.lines.append(alloc, .{ .stream = .stdout, .text = text, .entry_id = @intCast(index + 10), .terminated = true, }); } block.total_lines = block.lines.items.len; block.retained_text_bytes = 42;
const styles = Styles{ .system_notice_label_style = "", .system_notice_text_style = "", .reset_style = "", .dim_style = "", .red_style = "", }; var compact = try renderCompactCommandOutput(alloc, block, .{ .styles = styles, }, 40); defer compact.deinit(alloc);
try std.testing.expectEqual(@as(usize, 6), std.mem.count(u8, compact.bytes.items, "\n") + 1); try std.testing.expect(std.mem.find(u8, compact.bytes.items, "│ line-5") != null); try std.testing.expect(std.mem.find(u8, compact.bytes.items, "│ line-6") == null); try std.testing.expect(std.mem.find(u8, compact.bytes.items, "│ … 2 lines more (ctrl o to view)") != null);}
test "compact command output stays bounded at one and two columns" { const alloc = std.testing.allocator; var block: CommandOutputBlock = .{ .total_lines = 1 }; defer block.deinit(alloc); try block.lines.append(alloc, .{ .stream = .stdout, .text = try alloc.dupe(u8, "abcdefghijklmnopqrst"), .entry_id = 10, }); const styles = Styles{ .system_notice_label_style = "", .system_notice_text_style = "", .reset_style = "", .dim_style = "", .red_style = "", };
for ([_]u16{ 1, 2 }) |cols| { var projection = try renderCompactCommandOutput(alloc, block, .{ .styles = styles, }, cols); defer projection.deinit(alloc);
try std.testing.expectEqual( @as(usize, compact_output_row_limit + 1), hardLineCount(projection.bytes.items), ); var rows = std.mem.splitScalar(u8, projection.bytes.items, '\n'); while (rows.next()) |row| { try std.testing.expect( display_width.visibleWidthIgnoringAnsi(row) <= cols, ); } }}
test "compact zero width prefix matches the first five full rows" { const alloc = std.testing.allocator; var block: CommandOutputBlock = .{ .total_lines = 1 }; defer block.deinit(alloc); var text: std.ArrayList(u8) = .empty; errdefer text.deinit(alloc); try text.append(alloc, 'a'); for (0..2000) |_| try text.appendSlice(alloc, "\xcc\x81"); const line_text = try text.toOwnedSlice(alloc); var line_text_owned = true; errdefer if (line_text_owned) alloc.free(line_text); try block.lines.append(alloc, .{ .stream = .stdout, .text = line_text, .entry_id = 10, }); line_text_owned = false;
const styles = Styles{ .system_notice_label_style = "", .system_notice_text_style = "", .reset_style = "", .dim_style = "", .red_style = "", }; var compact = try renderCompactCommandOutput(alloc, block, .{ .styles = styles, }, 4); defer compact.deinit(alloc); const full = try renderFullCommandOutputRecord( alloc, styles, block.lines.items[0].text, 4, ); defer alloc.free(full);
try std.testing.expectEqual(@as(usize, 6), hardLineCount(compact.bytes.items)); var compact_rows = std.mem.splitScalar(u8, compact.bytes.items, '\n'); var full_rows = std.mem.splitScalar(u8, full, '\n'); for (0..compact_output_row_limit) |_| { try std.testing.expectEqualStrings(full_rows.next().?, compact_rows.next().?); } const hint = compact_rows.next() orelse return error.TestExpectedHint; try std.testing.expect(std.mem.find(u8, hint, "…") != null); try std.testing.expect(compact_rows.next() == null); try std.testing.expectEqual( @as(usize, compact_output_row_limit * (assistant_wrap.literal_command_zero_width_row_byte_limit / 2)), std.mem.count(u8, compact.bytes.items, "\xcc\x81"), );}
test "compact incomplete retained record shows one hidden line" { const alloc = std.testing.allocator; var block: CommandOutputBlock = .{ .total_lines = 1, .retention_overflow = true, .overflow_line_index = 0, }; defer block.deinit(alloc); try block.lines.append(alloc, .{ .stream = .stdout, .text = try alloc.dupe(u8, "retained prefix"), .entry_id = 10, });
var compact = try renderCompactCommandOutput(alloc, block, .{ .styles = .{ .system_notice_label_style = "", .system_notice_text_style = "", .reset_style = "", .dim_style = "", .red_style = "", }, }, 80); defer compact.deinit(alloc);
try std.testing.expectEqualStrings( "│ retained prefix\n│ … 1 line more (ctrl o to view)", compact.bytes.items, );}
test "compact hint stays at the final owned source entry" { const alloc = std.testing.allocator; var block: CommandOutputBlock = .{ .total_lines = 2 }; defer block.deinit(alloc); try block.lines.append(alloc, .{ .stream = .stdout, .text = try alloc.dupe(u8, "one two three four five six seven eight nine ten"), .entry_id = 10, }); try block.lines.append(alloc, .{ .stream = .stdout, .text = try alloc.dupe(u8, "later hidden record"), .record_ordinal = 1, .entry_id = 30, });
var projection = try renderCompactCommandOutput(alloc, block, .{ .styles = .{ .system_notice_label_style = "", .system_notice_text_style = "", .reset_style = "", .dim_style = "", .red_style = "", }, }, 12); defer projection.deinit(alloc);
const first = projection.bytesForEntry(10).?; const final = projection.bytesForEntry(30).?; try std.testing.expect(std.mem.find(u8, first, "ctrl o") == null); try std.testing.expect(std.mem.find(u8, final, "│ … 2 more") != null);}
test "compact process row consumes payload budget before final hint" { const alloc = std.testing.allocator; var block: CommandOutputBlock = .{ .total_lines = 6 }; defer block.deinit(alloc); for (0..6) |index| { try block.lines.append(alloc, .{ .stream = .stdout, .text = try std.fmt.allocPrint(alloc, "line-{d}", .{index + 1}), .record_ordinal = index, .entry_id = @intCast(index + 1), }); }
var projection = try renderCompactCommandOutputWithProcessPresentation( alloc, block, .{ .styles = .{ .system_notice_label_style = "", .system_notice_text_style = "", .reset_style = "", .dim_style = "", .red_style = "", }, }, 80, .{ .exit_code = 7 }, ); defer projection.deinit(alloc);
try std.testing.expectEqual(@as(usize, 6), hardLineCount(projection.bytes.items)); try std.testing.expect(std.mem.find(u8, projection.bytes.items, "│ line-4") != null); try std.testing.expect(std.mem.find(u8, projection.bytes.items, "│ line-5") == null); const final = projection.bytesForEntry(6).?; const status_index = std.mem.find(u8, final, "│ exit code 7") orelse return error.TestExpectedStatus; const hint_index = std.mem.find(u8, final, "│ … 2 lines more") orelse return error.TestExpectedHint; try std.testing.expect(status_index < hint_index);}
pub fn syncCommandOutputBlockEntries(shell: anytype, alloc: Allocator) !bool { if (shell.command_output_blocks.items.len == 0) return false; var changed = false; const cols: u16 = if (shell.layout.cols > 0) shell.layout.cols else 80; var entry_indices: std.AutoHashMapUnmanaged(u32, usize) = .empty; defer entry_indices.deinit(alloc); for (shell.entries.items, 0..) |entry, index| { if (entry != .raw_bytes) continue; const result = try entry_indices.getOrPut(alloc, entry.raw_bytes.id); if (!result.found_existing) result.value_ptr.* = index; } for (shell.command_output_blocks.items) |block| { var projection = try renderCompactCommandOutputWithProcessPresentation( alloc, block, shell.command_output_render, cols, processPresentationForBlock(shell, block), ); defer projection.deinit(alloc); for (block.lines.items, 0..) |_, line_index| { const entry_id = commandOutputLineEntryId(block, line_index) orelse continue; changed = try syncCommandOutputEntry( shell, alloc, projection, entry_id, &entry_indices, ) or changed; } for (block.pruned_ranges.items) |range| { changed = try syncCommandOutputEntry( shell, alloc, projection, range.anchor_entry_id, &entry_indices, ) or changed; } } return changed;}
fn syncCommandOutputEntry( shell: anytype, alloc: Allocator, projection: CommandOutputProjection, entry_id: u32, entry_indices: *const std.AutoHashMapUnmanaged(u32, usize),) !bool { const desired = projection.bytesForEntry(entry_id) orelse ""; const entry_index = entry_indices.get(entry_id) orelse return false; var raw = &shell.entries.items[entry_index].raw_bytes; raw.class = .command_output; if (std.mem.eql(u8, raw.bytes, desired)) return false; const replacement = try alloc.dupe(u8, desired); alloc.free(raw.bytes); raw.bytes = replacement; return true;}