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feat: archive subagent transcripts as their own sessions (#31) - #71
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Navigate logical layers of code changes, visualize relationships, and explore their blast radius. WalkthroughThe change adds subagent transcript discovery and indexing, stores parent-session links and child counts, and supports subagent-aware listings and retrieval across the database, CLI, MCP, search, analytics, and TUI. Listings hide subagents by default, with options to include them or select one parent’s subagents. ChangesSubagent transcript support
Priority: ➖ Normal Estimated code review effort: 4 (Complex) | ~60 minutes Change: Feature · Severity of issue fixed: Medium Sequence Diagram(s)sequenceDiagram
participant ClaudeCode
participant SubagentScanner
participant ClaudeCodeAdapter
participant Sync
participant SessionDatabase
ClaudeCode->>SubagentScanner: locate agent transcript files
SubagentScanner->>ClaudeCodeAdapter: return transcript paths and project data
ClaudeCodeAdapter->>Sync: provide parsed session and parent metadata
Sync->>SessionDatabase: store subagent session and parent link
Merge Risk: 🔵 Low · up to Subagent data remains accessible, but back navigation can show the wrong session or list, and listings make some subagents harder to identify. These bounded UI issues warrant owner awareness or follow-up. Security Architecture ReviewSecurity architecture risk: 🔵 Low · up to Subagent conversations become accessible to existing archive readers, even when omitted from default listings. Distinct session identifiers and transactional writes protect parent records and contain partial failures. No introduced security vulnerability was established, but deployment trust assumptions and concurrent ingestion remain incompletely verified. Retained concerns Security review detailsSecurity Blast Radius
Security Findings and Attack Paths
Trust Boundaries and Controls
Resilience and Maintainability Implications
Hardening Proposals
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 59.46% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 74 functions across 28 files. (3 skipped: 3 unsupported.)
✨ Finishing Touches 💡 1📝 Generate docstrings 💡
🧪 Generate unit tests (beta)
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…d the link A subagent transcript needs to be its own sessions row, and the relationship has to live somewhere a query can filter on. Migration 007 adds parent_session_id (NULL = top-level) plus the index both hot directions need, and backfills the rows nanoclaw already ingested by parsing their composite ids — the adapter always computed a parent_session_id into its Metadata, but with no column to hold it sync dropped it, so all 133 of those rows were orphaned. QuerySessions adds the three listing scopes every surface will share. SubagentsHidden deliberately still returns a subagent whose parent is absent from the archive: hiding rows is a sensible default, losing them is not. Every row carries SubagentCount regardless of scope, which is what earns the filtering. ALTER TABLE ADD COLUMN cannot be written replay-safe in SQLite, and migrations do get replayed (TestMigrator_005 rewinds schema_version and re-runs everything above it). The migrator now absorbs exactly that one error on exactly that one statement shape. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
The scanner skipped <project>/<session-uuid>/subagents/ with a TODO, and the TODO was hiding a real problem: a subagent transcript's in-band sessionId is its PARENT's uuid, so ingesting one under that id overwrites the session that dispatched it on the sessions.id primary key. On this machine that was 95 transcripts never archived, against 31 top-level ones. The fix is the id nanoclaw already mints, lifted into pkg/adapter so there is one spelling of it rather than one per adapter: claude-code:04fb5717-c508-4503-ac85-dc11787cafaa:agent-a01b71e80ea28b3ad nanoclaw:845f7a4e-2827-4f87-8c31-2e4d0b429405:agent-a07c3516373ab4719 parser.ScanSubagentFiles is the shared walk for the agent-<hex>.jsonl naming that ScanClaudeHome's uuid check rejects; nanoclaw's private copy of that walk, and its private copies of the path/meta.json helpers, are gone in favour of the shared ones. ScanClaudeHome still skips subagents/ — nanoclaw's two-phase discovery depends on it, and the split is now pinned by a test. Sync persists the parent link that the nanoclaw adapter has always computed and nothing ever stored. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Listing defaults are uniform across CLI, TUI, and MCP: top-level sessions
only, with a subagent_count on every row. The count is what earns the
filtering — a listing that drops rows without saying so is a trap.
ccvault list-sessions parents only, SUBS column
ccvault list-sessions --include-subagents flattened
ccvault list-sessions --subagents-of <id> one parent's children
ccvault show <subagent-id> works, no flag; names its parent
ccvault show <parent-id> reports its subagent count
list_sessions {include_subagents, subagents_of}
TUI: parents only; 'a' in a conversation opens that session's subagents
--json always emits parent_session_id (null for top-level) and
subagent_count, filtered or not, so a script reading the default output can
tell that rows were held back and from which parent.
Search is never filtered — the work a subagent did is most of what there is
to find — and each hit now carries parent_session_id so CLI and MCP renders
can label it with the session that dispatched it.
Analytics counts subagent sessions. They are additive, not duplicated: a
parent transcript contains no sidechain lines at all. On ~/.claude today that
is +21,812 turns and +5,811,001 tokens on top of 22,613 parent turns and
10,723,359 parent tokens — a 54% token increase that was previously invisible.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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Inline comments:
Review comments at @cmd/ccvault/main.go:
- Line 1118: Update the list-sessions output formatting around the fmt.Printf
row format so the session ID column width is computed from the returned IDs,
including composite IDs. Use that same width consistently for both layouts’
headers, rows, and separator lines, while preserving the existing alignment of
other columns.
Review comments at @internal/tui/sessions.go:
- Line 77: Update the default session list built in SessionsModel to display
each parent session’s SubagentCount, such as with a SUBS count or child
indicator column. Keep subagent rows hidden and preserve the conversation view’s
existing count and child-list navigation.
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📒 Files selected for processing (31)
README.mdcmd/ccvault/main.gocmd/ccvault/subagents_test.gointernal/analytics/subagents_test.gointernal/db/migrations/007_add_parent_session_id.sqlinternal/db/migrator.gointernal/db/migrator_replay_test.gointernal/db/sessions.gointernal/db/subagents_test.gointernal/mcp/server.gointernal/mcp/subagents_test.gointernal/projectref/projectref.gointernal/projectref/subagents_test.gointernal/search/search.gointernal/search/subagents_test.gointernal/sync/subagents_test.gointernal/sync/sync.gointernal/tui/app.gointernal/tui/conversation.gointernal/tui/sessions.gointernal/tui/subagents_test.gopkg/adapter/claudecode/claudecode.gopkg/adapter/claudecode/subagents_test.gopkg/adapter/nanoclaw/nanoclaw.gopkg/adapter/nanoclaw/nanoclaw_test.gopkg/adapter/subagent.gopkg/adapter/subagent_test.gopkg/models/models.gopkg/parser/subagents.gopkg/parser/subagents_test.goskills/ccvault/reference.md
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This was referenced Oct 2, 2026
…list Two defects in the subagent surfaces, both found in review. A minted subagent id is 72 characters against a uuid's 36, and list-sessions formatted the column with a fixed %-38s — which pads but never truncates. One subagent row therefore shoved every later column 34 places right while the header stayed put, so on a mixed list a reader could not tell which column was which. The column is now sized from the ids actually being rendered (longest + 2 of gutter, floored at the historical 38) and that width drives the header, the rows, and the separator together. Ids are never truncated: they are what a user copies into `show` / `export`, so a wide column beats a short id. The three magic separator widths are gone — the rule is computed from the named column widths. renderSessionsTable is extracted from the command so the alignment itself is testable, which is the property that makes the table readable at all. The TUI session list filtered subagent rows out and gave no sign they existed, which contradicts the rule that earns the filtering: the count is not optional garnish. It now carries a SUBS column at every width tier, paid for by MODEL (already the documented first-to-shrink column) rather than by dropping the column the way SOURCE is dropped — TestSessionsLayoutAlwaysBudgetsSubs pins that no tier may drop it. The cell's spelling now lives once, in internal/compact, so the CLI table and the TUI list cannot drift onto two renderings of the same number. "Hidden" stops being honest the moment the count disagrees with itself between surfaces. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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Closes #31.
Subagent transcripts (
<project>/<session-uuid>/subagents/agent-*.jsonl) are now archived from~/.claude, each as its own session row, and linked to the session that dispatched them.Analytics now count subagent sessions, so archive-wide numbers go up. That is a correction, not a regression — the old numbers were undercounting. Any saved before/after comparison will look like a regression and isn't one.
Measured by syncing the real
~/.claudetree into a throwaway archive on this branch:So
ccvault stats,orient, MCPget_statsandget_analyticswill report roughly +54% tokens and +96% turns on this machine once a sync runs. For the 63 parents already carrying ingested nanoclaw subagents the figure quoted in the issue holds: 2,905,646 parent tokens against 832,723 subagent tokens, about +29%.None of it is double-counted. A parent transcript contains zero
isSidechainlines — verified across all four real subagent directories on disk (982, 1651, 2969 and 2427 parent lines; zero sidechain lines in each) — so a subagent's turns exist only in the subagent file.Why the scanner skipped
subagents/The TODO was concealing a real problem. A subagent transcript's in-band
sessionIdis its parent's uuid:{"isSidechain": true, "agentId": "a01b71e80ea28b3ad", "parentUuid": null, "promptId": "a8ac7331-...", "sessionId": "04fb5717-...", // <- the PARENT's uuid "type": "user"}Ingesting that under its own
sessionIdoverwrites the parent row onsessions.id PRIMARY KEY.TestSubagentIDDoesNotCollideWithParentandTestParseSubagentMintsCompositeIDboth fail onmain's behaviour for exactly that reason.The id scheme (nanoclaw's, lifted into shared code)
adapter.SubagentSessionIDis now the single place that spelling exists; the nanoclaw adapter was switched onto it (along with sharedIsSubagentPath/SubagentParentUUID/SubagentAgentID/ReadSubagentMeta), and its private copies of all four are gone.parser.ScanSubagentFilesis the shared walk for theagent-<hex>.jsonlnaming thatScanClaudeHome's uuid check rejects; nanoclaw's duplicate walker is gone too.ScanClaudeHomestill skipssubagents/— nanoclaw's two-phase discovery depends on it — and a test now pins that split.Migration 007:
parent_session_id, and a backfillThe relationship lives in a real nullable column (NULL = top-level), indexed in both hot directions.
The 133 previously-ingested nanoclaw rows were orphaned. The nanoclaw adapter has always computed a
parent_session_idinto itsMetadata— but there was no column, so sync silently dropped it. Verified read-only against the live archive:PRAGMA table_info(sessions)had no such column, so not one of those 133 rows carried a usable parent link. Only the composite id did, and that is enough: the parent id is the id minus its last:segment.Dry-run of the backfill predicate against the live archive, read-only:
subagents/path the predicate would missThe 3 whose parent is absent still get the truthful link, and the default listing deliberately keeps showing them (see below).
ALTER TABLE ADD COLUMNcannot be made replay-safe in SQLite, and migrations do get replayed —TestMigrator_005_NormalizesDisplayNamesrewindsschema_versionand re-runs everything above it, which is how 007 first broke it. The migrator now absorbs exactlyduplicate column nameon exactly anALTER TABLE ... ADD COLUMN; every other failure still rolls the migration back. Two tests cover the tolerance and its blast radius.Visibility: hidden, not secret, never unreachable
ccvault list-sessionsSUBScolumn per row--include-subagents,--subagents-of <id>ccvault list-sessions --jsonparent_session_id+subagent_countccvault show/exportshowprintsSubagent of: <id>/Subagents: N (…)ccvault searchSubagent of: <id>SUBScolumn per rowain a conversation opens that session's subagentsN subagents (a)/subagent of <id>list_sessionssubagent_countinclude_subagents,subagents_ofsearch_conversationsparent_session_idget_session/get_turnsorientSubagentsHiddenalso returns any subagent whose parent is not in the archive. Without that, a sidechain ingested without its parent would appear in no listing and be counted by no parent'ssubagent_count— filtering would have become losing.promptId: no, butmeta.json'stoolUseIddoesMeasured across all 95 real subagent transcripts on this machine:
promptIdis present on 95/95 and resolves to apromptIdin the parent 95/95 — but it identifies a prompt round, not a turn. One promptId spans many parent turns (5 in one sampled case) and 18 of them are shared by more than one subagent. It is not a link to the dispatching turn, so nothing is recorded for it.agent-*.meta.jsoncarriestoolUseId, which is the dispatchingtool_useblock: 87/95 resolve to atool_useid in the parent transcript. All 8 misses are nested agents (spawnDepth≥ 2) whose dispatch lives in a sibling subagent's transcript — confirmed by finding the id there.toolUseIdis parsed intoadapter.SubagentMetaand documented, but not stored:tool_useshas no tool-use-id column to join against until #28 lands tool payloads. Recording it is a cheap follow-up on top of #28.Verification
Real-data run (throwaway archive,
~/.ccvaultnever touched):A second sync skips all 126 (
TestSyncSubagentIsIncrementalpins the mtime bookkeeping).Out of scope, found along the way
cwdis authoritative for its project, and worktree-isolated agents really do run in.../.claude/worktrees/agent-*. On this machine that produced 12 project rows whose only sessions are subagents, whichlist-projectswill show. Same rule every session already follows, so nothing was overridden — but worth an issue on whether a subagent should inherit its parent's project.list-sessions --jsonreportshas_error/has_subagentas always-false.GetSessionsPagehas never selected those two columns, so the Class C emitter serialises the zero value. Pre-existing and untouched here (fixing it changes existing output values).model/git_branch— scanned into plain strings. Not newly triggered: the sync write path always writes a value, so NULL only arises from hand-inserted rows. Left alone as instructed.analytics.SessionRecord(parquet) does not carryparent_session_id, so DuckDB views can count subagents but not split them out. Additive follow-up.Review fixes
Two defects found in review, both fixed in
12d2f9d:list-sessionscolumn blowout. A minted subagent id is 72 chars against a uuid's 36, and the table used a fixed%-38s— which pads but never truncates, so one subagent row shoved every later column 34 places right while the header stayed put. The SESSION ID column is now sized from the ids being rendered (longest + 2 of gutter, floored at the historical 38), and that one width drives the header, the rows, and the separator together. Ids are never truncated — they are what a user copies intoshow/export. The three hand-maintained separator widths are gone, computed from the named column widths instead.renderSessionsTableis extracted from the command so the alignment is testable. A uuid-only listing renders byte-identically to before (pinned by a test).list-projectsrenders no session ids, so it was never affected.SUBScolumn at every width tier, paid for by MODEL (already the documented first-to-shrink column) rather than by dropping the column the way SOURCE is dropped.TestSessionsLayoutAlwaysBudgetsSubspins that no tier may drop it, and the pre-existingTestSessionsLayoutFitsWithinBudgetvalidates the new tier arithmetic.The cell's spelling now lives once, in
internal/compact, so the CLI table and the TUI list cannot drift onto two renderings of the same number.🤖 Generated with Claude Code
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ato open a session’s subagents.