This release is a broad performance pass — batching git and GitHub
operations to eliminate N+1 calls across nearly every command — together
with a sync --dry-run correctness fix and cleaner sync output.

Highlights

• sync --dry-run is now a true read-only preview. Previously it could perform side effects; it now never fast-forwards trunk, deletes branches, restacks, or pushes to GitHub — it just shows you what sync would do (#1236).
• Faster commands across the board. Git and GitHub operations are now batched throughout submit, sync, merge, delete, create, reorder, fold, absorb, log, and the dashboard, removing per-branch N+1 calls. The global revision cache was replaced with explicit batched readers, so large stacks feel noticeably snappier.
• Cleaner sync output. The streaming and interactive sync output was decluttered and polished, and empty phase headers are now suppressed in the interactive sync TUI (#1237, #1238, #1268).
• Accurate file and commit counts. info and stack-info now count changed files against the stack's divergence point rather than whole history, and commit lists are based on the divergence point too — so counts reflect the branch's actual changes (#1260, #1261, #1265).

Fixes

• Make sync --dry-run a true read-only preview (#1236).
• Base commit lists on the divergence point, not whole history (#1265).
• Count changed files in info against the divergence point (#1261).
• Count changed files in stack-info against the divergence point (#1260).
• Don't report a worktree as removed when anchor branch deletion fails (#1248).
• Escape Slack mrkdwn special characters in share output (#1246).
• Declutter and polish sync streaming output (#1237).
• Suppress empty phase headers in the interactive sync TUI (#1238).
• Polish sync output quality (#1268).

Performance

• Batch behind-branch pulls and prefetch remote branch statuses in a parallel block on sync (#1206, #1207).
• Batch orphaned-metadata cleanup into one transaction on sync (#1230).
• Batch PR-info writes, warm caches, and batch revision resolution in submit planning (#1228, #1256).
• Read external-parent remote status in one batch on submit (#1229).
• Batch PR-info writes during consolidation merge, sync, and submit validation (#1205, #1216).
• Batch child reparenting on insert in create (#1226) and pre-reparent of children in delete (#1227).
• Resolve PR node IDs in one GraphQL query and batch PR state/body fetch in consolidation cleanup (#1231, #1233).
• Batch ref deletions in DeleteBranch to match DeleteBranches (#1239).
• Batch child metadata writes in RenameBranch (#1220).
• Batch commit-to-branch lookups in absorb (#1221).
• Reparent same-parent children in one pass for fold and pluck (#1222).
• Reparent via batched ReparentBranchesToParents in reorder and flatten (#1225).
• Warm revision and stat caches before per-branch loops (#1223).
• Batch PR status and warm caches for the stack in stack-info (#1224).
• Batch commit messages in the dashboard shippable rebuild (#1262).
• Annotate the log action from batched BranchStats (#1257).
• Read stack metadata in a single cat-file lookup (#1232).

Refactors

• Remove the global revision cache in favor of explicit batched readers (#1258).
• Add per-concern batch readers for branch state (#1252).
• Bound batchByBranch fan-out and add a concurrency rule (#1264).
• Plan flatten from batched revision/divergence values (#1253).
• Annotate log from batched stats, keeping forge status a separate concern (#1254, #1259).
• Trim the batch cleanup APIs (#1234).
• Consolidate split-hunk cleanup with a deferred branch restore (#1247).
• Extract helpers to cut duplication — applyPRMetadata, buildBatchPRNodeQuery, Plan.BranchNames(), and splitNulTerminated (#1204, #1243, #1255, #1273).
• Remove redundant GetBranch calls in InfoAction (#1272).
• Tidy review nits in the branch-state readers (#1263).

Chore

• Update all Go and frontend dependencies to latest versions (#1240).
• Add the /optimize-tests dev skill for coverage-guarded test speedups, hardened with parallel-hazard detection and a union coverage guard (#1208, #1213).
• Parallelize the action test suite for faster runs (#1209, #1210, #1211, #1212).
• Add a golden-output transcript harness for sync (#1217, #1218).

What's Changed

• refactor: extract applyPRMetadata helper to remove duplication by @jonnii in #1204
• perf: batch PR info writes during consolidation merge by @jonnii in #1205
• feat: add /optimize-tests skill for coverage-guarded test speedups by @jonnii in #1208
• perf(test): parallelize action-package tests and harden /optimize-tests skill by @jonnii in #1214
• perf(test): parallelize fold/move/pluck action subtests by @jonnii in #1209
• perf(test): parallelize sync action subtests by @jonnii in #1210
• perf(test): parallelize 10 action subpackages' scenario tests by @jonnii in #1211
• perf(test): parallelize root actions package tests (excluding stdin-mutating modify) by @jonnii in #1212
• feat(skill): harden /optimize-tests with parallel-hazard detection and union coverage guard by @jonnii in #1213
• Merging 2 PRs by @jonnii in #1215
• perf(sync): batch behind-branch pulls by @jonnii in #1206
• perf(sync): prefetch remote branch statuses in Phase 1 parallel block by @jonnii in #1207
• perf: batch PR info writes during sync and submit validation by @jonnii in #1216
• Merging 2 PRs by @jonnii in #1219
• refactor: extract reusable golden helper and sync prompt-description helpers by @jonnii in #1217
• test: add golden-output transcript harness for sync by @jonnii in #1218
• perf(create): batch child reparenting on insert via ReparentBranchesRecompute by @jonnii in #1226
• perf(submit): read external parent remote status in one batch by @jonnii in #1229
• perf(delete): batch pre-reparent of children via ReparentBranchesToParents by @jonnii in #1227
• Merging 12 PRs by @jonnii in #1235
• perf(engine): batch child metadata writes in RenameBranch by @jonnii in #1220
• perf(absorb): batch commit-to-branch lookups via FindBranchesForCommits by @jonnii in #1221
• perf(fold,pluck): reparent same-parent children via ReparentBranches by @jonnii in #1222
• perf: warm revision/stat caches before per-branch loops by @jonnii in #1223
• perf(stack-info): batch PR status and warm caches for the stack by @jonnii in #1224
• perf(reorder,flatten): reparent via per-branch ReparentBranchesToParents by @jonnii in #1225
• perf(submit): batch PR-info writes and warm caches during planning by @jonnii in #1228
• perf(sync): batch orphaned-metadata cleanup in one transaction by @jonnii in #1230
• perf(merge): resolve PR node IDs in one GraphQL query by @jonnii in #1231
• perf(git): read stack metadata in one cat-file lookup by @jonnii in #1232
• perf(merge): batch PR state/body fetch in consolidation cleanup by @jonnii in #1233
• refactor: trim batch cleanup APIs by @jonnii in #1234
• perf: batch ref deletions in DeleteBranch to match DeleteBranches by @jonnii in #1239
• chore: update all dependencies to latest versions by @jonnii in #1240
• refactor: add Plan.BranchNames() to eliminate repeated branch-name extraction loops by @jonnii in #1243
• feat: Postgres-backed repo store for the API server by @jonnii in #1244
• feat: add PostgreSQL repo-config store for the API server by @jonnii in #1067
• feat: serve API server repos from the Postgres store by @jonnii in #1068
• fix: escape Slack mrkdwn special chars in share output by @jonnii in #1246
• refactor: consolidate split hunk cleanup with deferred branch restore by @jonnii in #1247
• fix: don't report worktree as removed when anchor branch deletion fails by @jonnii in #1248
• refactor: extract buildBatchPRNodeQuery to eliminate duplicated GraphQL boilerplate by @jonnii in #1255
• test(store): use testcontainers locally instead of a fixed local Postgres by @jonnii in #1266
• Merging 13 PRs by @jonnii in #1267
• refactor(engine): per-concern batch readers for branch state by @jonnii in #1252
• refactor(flatten): plan from batched re...

Contributors

• @jonnii

This release makes submit and get dramatically faster by eliminating
N+1 git and GitHub calls, and fixes several restack correctness bugs around
how a PR's base is refreshed after force-pushes.

Highlights

• Much faster submit. The submit path no longer makes per-branch git and GitHub calls: the entire stack now pushes in a single git push, PR info is fetched in one GraphQL query, and remote ref reads, PR-content reads, and empty-branch validation are all batched. Submitting large stacks is substantially faster.
• Faster get. Parents are now derived from already-fetched metadata instead of a serial per-branch GitHub crawl, with O(1) branch lookups in target validation.
• Restack base.sha correctness. Fixes for refreshing a PR's stale GitHub base.sha after a restack force-push, preserving the divergence point when an old parent was squash-merged, and only refreshing on a genuine non-fast-forward parent rewrite — so stacked PRs show the right diff after restacks.
• Skip already-merged branches on restack. Restack no longer tries to rebase branches whose PR has already merged, and the REST PR-info fallback now records merged PRs as MERGED.

Fixes

• Record merged PRs as MERGED in the REST PR-info fallback (#1201).
• Only refresh base.sha on a non-fast-forward parent rewrite (#1200).
• Skip restacking branches whose PR is already merged (#1199).
• Refresh stale GitHub base.sha after a restack force-push, and preserve the divergence point when the old parent was squash-merged (#1193).
• Surface metadata write errors in RenameBranch (#1122).

Performance

• Batch the empty-branch validation check on submit (#1181).
• Overlap the remote read with PR sync and share a single ls-remote (#1180).
• Batch the remote read in submit planning (#1179).
• Batch PR-content reads in the footer pass (#1178).
• Fetch stack PR info in one GraphQL query (#1177).
• Push the entire stack in a single git push (#1176).
• Batch the remote ref read for stack submit (#1175).
• Derive get parents from fetched metadata instead of a serial GitHub crawl (#1170).
• Use an O(1) BranchNames lookup in ValidateTargetBranch (#1167).

Refactors

• Remove redundant PrInfo constructors (#1198).
• Use the Branches.Names() helper instead of manual extraction loops (#1188).
• Replace fmt.Sscanf("%d") with strconv.Atoi (#1185).
• Submit cleanup and feedback, folding HasSubmitWork into the action with lazy TUI start (#1182, #1183).
• Extract a crawlAncestorsViaGitHub helper in get (#1169).
• Use err.Error() in isCIFailure and avoid an allocation in the split prompt (#1168).
• Consolidate cleanup in splitByFileSibling with defer (#1166).
• Complete the Engine.Git() escape-hatch removal: route read-only queries, conflict recovery, staging, remote-metadata, and remaining domain git operations through the engine, add a MetadataInspector for diagnostic reads, and add a lint guard against new escape-hatch use (#1149–1158).
• Render colors via the output layer instead of tui/style (#1163).
• Narrow dependencies: branch patterns take a username, the GitHub client takes a 2-method GitCommandRunner, rerere takes a GitConfigurer, and validation takes an engine-state interface (#1155, #1157, #1161, #1162).
• Remove redundant GetBranch calls in the debug action loop (#1152).

Docs

• Add a performance guide covering SSH reuse and tracing (#1172).
• Document that lock/unlock sync GitHub immediately by design (#1173).

Chore

• Update all Go and web dependencies to latest (#1187).
• Add t.Parallel() to all TUI tests and cover metadata-driven discovery in get (#1171, #1186).

What's Changed

• Eliminate Engine.Git() escape-hatch: route ops through engine interfaces by @jonnii in #1159
• refactor(actions): route read-only git queries through the engine by @jonnii in #1149
• refactor(actions): route conflict recovery and staging through the engine by @jonnii in #1150
• refactor(actions): route remaining query and remote-metadata Git() calls through the engine by @jonnii in #1151
• refactor(engine): add MetadataInspector for diagnostic raw metadata reads by @jonnii in #1153
• refactor: eliminate the last production Engine.Git() escape-hatch uses by @jonnii in #1154
• refactor(validation): take engine state interface instead of the raw git runner by @jonnii in #1155
• refactor: route remaining domain git operations through the engine by @jonnii in #1156
• refactor(rerere): take a narrow GitConfigurer instead of the raw git runner by @jonnii in #1157
• chore(lint): guard against new Engine.Git() escape-hatch use by @jonnii in #1158
• refactor(github): depend on a 2-method GitCommandRunner, not the whole git.Runner by @jonnii in #1161
• refactor(config): branch patterns need a username, not the whole git runner by @jonnii in #1162
• refactor(actions): render colors via the output layer, not tui/style by @jonnii in #1163
• refactor: remove redundant GetBranch calls in debug action loop by @jonnii in #1152
• fix: surface metadata write errors in RenameBranch by @jonnii in #1122
• refactor(split): consolidate cleanup in splitByFileSibling with defer by @jonnii in #1166
• perf: use O(1) BranchNames lookup in ValidateTargetBranch by @jonnii in #1167
• docs(lock): document that lock/unlock sync GitHub immediately by design by @jonnii in #1173
• refactor: use err.Error() in isCIFailure and avoid alloc in split prompt by @jonnii in #1168
• Merging 4 PRs by @jonnii in #1174
• refactor(get): extract crawlAncestorsViaGitHub helper by @jonnii in #1169
• perf(get): derive parents from fetched metadata, not a serial GitHub crawl by @jonnii in #1170
• test(get): cover metadata-driven discovery and GitHub fallback by @jonnii in #1171
• docs: add performance guide (SSH reuse + tracing) by @jonnii in #1172
• Eliminate submit N+1s: batch remote reads, pushes, and GitHub API calls by @jonnii in #1184
• perf(submit): batch remote ref read for stack submit by @jonnii in #1175
• perf(submit): push entire stack in a single git push by @jonnii in #1176
• perf(submit): fetch stack PR info in one GraphQL query by @jonnii in #1177
• perf(submit): batch PR-content reads in the footer pass by @jonnii in #1178
• perf(submit): batch remote read in submit planning by @jonnii in #1179
• perf(submit): overlap remote read with PR sync, share one ls-remote by @jonnii in #1180
• perf(submit): batch the empty-branch validation check by @jonnii in #1181
• refactor(submit): fold HasSubmitWork into Action with lazy TUI start by @jonnii in #1182
• refactor: submit feedback by @jonnii in #1183
• refactor: replace fmt.Sscanf("%d") with strconv.Atoi by @jonnii in #1185
• test: add t.Parallel() to all TUI tests by @jonnii in #1186
• chore: update all Go and web dependencies to latest by @jonnii in #1187
• refactor: use Branches.Names() helper instead of manual loops by @jonnii in #1188
• fix: refresh stale GitHub base.sha after restack force-push by @jonnii in #1193
• fix: skip restacking branches whose PR is already merged by @jonnii in #1199
• refactor: remove redundant PrInfo constructors by @jonnii in #1198
• Merging 2 PRs by @jonnii in #1202
• fix: only refresh base.sha on a non-fast-forward parent rewrite by @jonnii in #1200
• fix: record merged PRs as MERGED in the REST PR-info fallback by @jonnii in #1201
• feat: add /pre-release-check skill for release go/no-go review by @jonnii in #1203

Full Changelog: v0.19.0...v0.19.1

Contributors

• @jonnii

This release makes stackit self-hostable as a service and far friendlier to
scripts and agents — a deployable server with auth, hardened non-interactive
workflows, new JSON introspection commands, lifecycle hooks, and a large round
of performance work.

Highlights

• Self-hostable stackit-server. The server is now deployable as a hosted service: GitHub OAuth gating with an allowlist, CSRF protection on mutating endpoints, structured audit logs, multi-repo config (reposRoot + owner/name coords), a multi-arch container published to ghcr.io, and a new deploy guide (#1015, #1016, #1017, #1055, #1008, #1009).
• Scripting- and agent-friendly CLI. Interactivity auto-disables on non-TTY and via STACKIT_NO_INTERACTIVE, -F/--message-file reads messages from a file or stdin across create/modify/squash/split, merge accepts --yes, and commands now fail loudly instead of silently falling back — no more accidental empty-branch creation (#1072, #1075, #1076, #1074, #1073).
• New introspection commands. stackit state --json gives a complete one-call snapshot of stack structure for tooling, stackit share renders Slack-ready stack output, and --json is now a first-class, self-describing source on log and merge status (#1083, #1082, #1077, #1107).
• Lifecycle command hooks. New pre/post command hooks with per-phase approval let you run custom commands around stackit operations (#1051, #1052).
• Faster across the board. A persistent git cat-file --batch process eliminates per-read process spawns, and git/GitHub calls are batched throughout sync, get, and snapshot paths (#1094, #1114, #1113, #1132, #1112).

Features

• Added stackit state command with a complete --json snapshot (#1083).
• Added stackit share command for Slack-ready stack output (#1082).
• Added --json flag to stackit merge status (#1107).
• Made log --json a complete, self-describing status source (#1077).
• Auto-disable interactivity for non-TTY and STACKIT_NO_INTERACTIVE (#1072).
• Made -F the --message-file shorthand on split (#1075).
• Accept --yes on the parent merge command for non-interactive use (#1076).
• Prompt for stack description on multi-PR ship (#1066).
• Added pre/post command lifecycle hooks with per-phase approval (#1051).
• Added the stack-ship skill (#1106).
• Server: gate API behind GitHub OAuth + allowlist (#1015).
• Server: require X-Stackit-CSRF on mutating endpoints (#1016).
• Server: structured audit logs on mutating calls (#1017).
• Server: multi-repo config with reposRoot and owner/name coords (#1055).
• Server: auto-compute CSP script-src hashes from the embedded static FS (#1060).
• Server: log version, commit, and build date on startup (#1056).
• Server: harden HTTP middleware for public deploy (#1011).
• Server: publish a multi-arch container to ghcr.io (#1008).
• Server: fall back to $PORT env when -port isn't set (#1007).

Fixes

• Restore the original branch after a pre-commit hook failure in create (#1148).
• Prevent merge next from leaving the user in a detached HEAD state (#1146).
• Fall back to the mergeable field when mergeStateStatus is unavailable on GitHub Enterprise (#1144).
• Handle ignored errors from metadata cache writes in PR updates (#1142).
• Replay rerere in the rebase auto-continue error path (#1139).
• Multi-stack dry-run no longer bypasses the --yes guard in non-interactive mode (#1137).
• Normalize hook commands to trimmed form before approval checks (#1136).
• Clear the cat-file process on batch I/O failure (#1135).
• Force-update remote-tracking refs on explicit branch fetch (#1134).
• Use valid merge-tree fast-path syntax (#1133).
• Fail closed for unapproved pre-command hooks (#1131).
• Harden CLI sync and worktree status (#1128).
• Expose undo.enabled in the config CLI (#1126).
• Preserve the merge branch in PR info updates (#1125).
• Avoid duplicate worktree create hooks (#1124).
• Require --yes for non-interactive merge (#1123).
• Avoid duplicate PR branch lookups (#1115).
• Reject silent empty-branch creation when changes aren't staged (#1074).
• describe fails loudly in non-interactive mode and accepts -F/--message-file (#1073).
• Correct and harden Claude/Codex agent integration templates (#1071).
• Prompt before entering the conflict workflow on restack (#1069).
• Web: default API_BASE to same-origin, fixing a connect-src CSP violation (#1061).
• Web: route picker selection via ?repo= query string (#1006).

Performance

• Persistent git cat-file --batch process for zero-spawn metadata reads (#1094).
• Compile branch-name and GraphQL-alias regexes once at package init (#1093).
• Batch merge remote status checks (#1132).
• Refresh get branches selectively (#1116).
• Batch sync fetches (#1114).
• Batch get fetches (#1113).
• Batch stack ID propagation into a single transaction (#1112).
• Fix untrack N+1 rebuild with BatchUntrackBranches (#1087).
• Batch revision lookups in TakeSnapshot (#1079).
• Use cached ctx.Config in the trunk command (#1080).

Refactors

• Normalize hook phase config (#1129).
• Introduce BranchRemoteStatuses type and remove GetBranchRemoteStatus (#1121).
• Replace remote SHA cache warming (#1117).
• Eliminate duplicate CreatePullRequest logic and fix silent error swallowing (#1064).
• Hooks: tighten the resolve API and drop deprecated wrappers (#1053).
• Config: generalize hook approval keys to a per-phase family (#1050).
• Hooks: extract a shared runner from worktree hooks (#1049).
• Server: migrate stdlib log to slog with structured, leveled output (#1059).
• Engine: consolidate duplicate ancestor-walk helpers (#1047).
• Engine: split engine_sync.go and types.go by concern (#1046).
• Actions: prune redundant eng.Rebuild() calls and document the rest (#1045).
• Engine: push metadata-ref transport down into the engine (#1044).
• Engine: drop redundant lowercase getter wrappers (#1043).
• Engine: unify SetParent under explicit DivergenceMode (#1042).
• Engine: drop Options.Writer and best-effort metadata-cleanup warnings (#1041).
• Engine: auto-rebuild after delete, auto-sync stack ID after reparent (#1040).
• Engine: split engine_writer.go by concern (#1039).

Docs

• Use stackit state --json as the one-call preflight in agent skills (#1084).
• Annotate cross-cutting.md with implementation status (#1086).
• Document lifecycle phases, env vars, and recipes for hooks (#1052).
• Add a deploy guide for the hosted stackit-server (#1009).

Chore

• Update all dependencies to the latest versions (#1127).
• Add a server env:init mise task to populate .env via gh + openssl (#1058).
• Document required server env vars via .env.template (#1057).
• Test suite cleanup: consolidate, parallelize, and delete duplicate tests (#1141, #1105, #1104, #1103, #1102, #1101, #1100, #1099, #1098, #1097, #1096, #1095, #1081).

What's Changed

• Merging 9 PRs by @jonnii in #1048
• refactor(engine): split engine_writer.go by concern by @jonnii in #1039
• refactor(engine): auto-rebuild after delete, auto-sync stack ID after reparent by @jonnii in #1040
• refactor(engine): drop Options.Writer and best-effort metadata-cleanup warnings by @jonnii in #1041
• refactor(engine): unify SetParent under explicit DivergenceMode by @jonnii in #1042
• refactor(engine): drop redundant lowercase getter wrappers by @jonnii in #1043
• refactor(engine): push metadata-ref transport down into engine by @jonnii in #1044
• refactor(actions): prune redundant eng.Rebuild() calls; document the rest by @jonnii in #1045
• refactor(engine): split engine_sync.go and types.go by concern by @jonnii in #1046
• refactor(engine): consolidate duplicate ancestor-walk helpers by @jonnii in #1047
• Merging 9 PRs by @jonnii in #1054
• fix(web): route picker selection via ?repo= query string by @jonnii in #1006
• feat(server): fall back to $PORT env when -port isn't set by @jonnii in #1007
• feat(server): publish multi-arch container to ghcr.io by @jonnii in #1008
• docs: add deploy guide for hosted stackit-server by @jonnii in #1009
• feat(server): harden HTTP middleware for public deploy by @jonnii in #1011
• feat(server): gate API behind GitHub OAuth + allowlist by @jonnii in #1015
• feat(server): require X-Stackit-CSRF on mutating endpoints by @jonnii in #1016
• feat(server): structured audit logs on mutating calls by @jonnii in #1017
• build: publish dev by @jonnii in #1012
• Merging 7 PRs by @jonnii in #1062
• feat(server): multi-repo config with reposRoot and owner/name coords by @jonnii in #1055
• feat(server): log version, commit, build date on startup by @jonnii in #1056
• chore(server): document required env vars via .env.template by @jonnii in #1057
• chore(server): add env:init mise task to populate .env via gh + openssl by @jonnii in #1058
• refactor(server): migrate stdlib log to slog with structured, leveled output ...

Contributors

• @jonnii

This release lays groundwork for hosted multi-repo support in the server and web app, and finishes dropping the go-git dependency in favor of shelling out to native git.

Highlights

• Multi-repo server support: a new -repos-config flag lets the server back multiple repositories, with GET /api/v1/repos returning the registered set and per-repo SSE broadcasters keeping watchers isolated. The web app gained a repo picker so a single instance can drive multiple stacks.
• go-git is gone. All git operations now shell out to the native git CLI, which eliminates the long-standing divergence between the two code paths and removes a large transitive dependency tree. ConfigStore, fetch/push, staging, and read-only history ops all use git directly.
• Batched metadata writes via git hash-object --stdin-paths, plus for-each-ref --merged for merged-branch detection, cut process spawns on hot paths.
• stackit submit now skips the push when the local branch is already in sync with its remote, avoiding redundant network calls during repeated submits.

Features

• Server -repos-config flag for serving multiple repos (#978).
• GET /api/v1/repos lists registered repositories (#979).
• Per-repo broadcaster and watcher in the API (#980).
• Web app repo picker and multi-repo client (#981).
• Registry package for multi-repo support in the API (#976).

Fixes

• stackit submit skips push when the branch is already in sync with the remote (#1014).
• Distinguish detached HEAD from real errors in GetWorktreeCurrentBranch (#1034).
• Log a debug breadcrumb when getRemote falls back to the default (#1035).

Performance

• Batch metadata blob writes via git hash-object --stdin-paths (#1024).
• Replace O(n2) bubble sort and manual reversal with slices stdlib (#1026).

Refactors

• Drop go-git dependency entirely; native git CLI is used for all operations (#1019, #1020, #1021, #1022, #1023).
• Add metadata blob batch writers and drop unused singletons (#1028).
• Batch GetMergedBranches via for-each-ref --merged (#1027).
• Route repoRoot reads through getRepoRoot and tighten the ls-files exit-code check (#1029).
• Surface os.Getwd error in ensureRepo (#1030).
• Plumb context.Context through batch blob writers and read-path git operations (#1036, #1037).
• API handlers take a registry; add /repos/{repoID}/... routes (#977).

Docs

• Add hosted multi-tenant server plan (#975).
• Clarify that ConfigStore.Get reads merged config scope (#1033).
• Drop stale go-git references from comments (#1031).

Chore

• Baseline benchmarks for the go-git hot paths captured before removal (#1018).

What's Changed

• Merging 7 PRs by @jonnii in #1005
• docs(plans): add hosted multi-tenant server plan by @jonnii in #975
• feat(api): add registry package for multi-repo support by @jonnii in #976
• refactor(api): handlers take registry, add /repos/{repoID}/... routes by @jonnii in #977
• feat(server): -repos-config flag for serving multiple repos by @jonnii in #978
• feat(api): GET /api/v1/repos lists registered repositories by @jonnii in #979
• feat(api): per-repo broadcaster and watcher by @jonnii in #980
• feat(web): repo picker and multi-repo client by @jonnii in #981
• Drop go-git dependency, shell out to native git for all ops by @jonnii in #1025
• test(git): add baseline benchmarks for go-git hot paths by @jonnii in #1018
• refactor(git): replace go-git in read-only history ops with shell-out by @jonnii in #1019
• refactor(git): replace go-git staging ops with native git commands by @jonnii in #1020
• refactor(git): drop go-git fetch/push, use git CLI exclusively by @jonnii in #1021
• refactor(git): rewrite ConfigStore on top of git config CLI by @jonnii in #1022
• refactor(git): drop go-git dependency entirely by @jonnii in #1023
• perf(git): batch metadata blob writes via git hash-object --stdin-paths by @jonnii in #1024
• Merging 5 PRs by @jonnii in #1032
• refactor(git): batch GetMergedBranches via for-each-ref --merged by @jonnii in #1027
• refactor(git): add metadata blob batch writers, drop unused singletons by @jonnii in #1028
• refactor(git): route repoRoot reads through getRepoRoot, tighten ls-files exit-code check by @jonnii in #1029
• refactor(git): surface os.Getwd error in ensureRepo by @jonnii in #1030
• docs(git): drop stale go-git references from comments by @jonnii in #1031
• perf: replace O(n2) bubble sort and manual reversal with slices stdlib by @jonnii in #1026
• fix(submit): skip push when branch is already in sync with remote by @jonnii in #1014
• Merging 5 PRs by @jonnii in #1038
• docs(git): clarify ConfigStore.Get reads merged config scope by @jonnii in #1033
• fix(git): distinguish detached HEAD from real errors in GetWorktreeCurrentBranch by @jonnii in #1034
• fix(git): log debug breadcrumb when getRemote falls back to default by @jonnii in #1035
• refactor(git,engine): plumb context through batch blob writers by @jonnii in #1036
• refactor(git,engine): plumb context through read-path git operations by @jonnii in #1037

Full Changelog: v0.18.0...v0.18.1

Contributors

• @jonnii

A big release focused on worktree workflows, a broad performance pass across restack/merge/cleanup, and a long tail of correctness fixes around restack, merge, and modify.

Highlights

• New stackit worktree run command lets you run a one-off shell command inside a managed worktree without checking it out manually (#974).
• Worktree management is much sturdier: managed worktrees are now anchored so they survive moves and re-checkouts (#949), worktree repair plus richer status output makes broken worktrees easy to recover (#950), and removal/sync cleanup paths handle failure modes more gracefully (#948, #951).
• Naked stackit modify now amends in place without bouncing you into an editor, matching what users actually expect from a quick amend (#1002).
• Major performance pass across the engine: native-git checkout (#963, #964), cached worktree/metadata snapshots during restack and merge (#984, #987, #988, #993, #994), batched ref deletions (#985, #990, #991), and fast-tree-equality short-circuits during branch cleanup planning (#999) — restack, merge, and sync are all noticeably snappier on large stacks.
• Restack reliability fixes: HEAD is detached before conflict-workflow rebases so the workflow no longer corrupts the original branch (#953), trunk is properly excluded from restack plans (#938), and branches are now classified by validation result rather than spec position so partial failures are reported correctly (#954).

Features

• Add stackit worktree run command for executing commands inside a managed worktree (#974).
• Anchor managed worktrees so they remain valid across repository moves (#949).
• Add worktree repair and richer worktree status output (#950).

Fixes

• Restack: exclude trunk from restack plans (#938).
• Restack: detach HEAD before conflict-workflow rebase so the original branch is preserved (#953).
• Restack: classify branches by validation result rather than spec position so partial failures are reported correctly (#954).
• Move: let interactive users resolve conflicts and continue instead of aborting (#940).
• Merge: surface DeleteBranch failures during ship cleanup so silent leftovers are caught (#970).
• Merge: drop the remote metadata ref when ship deletes a branch (#971).
• Git: handle packed refs in DeleteBranch and DeleteRef (#972).
• Git: honor context cancellation in reset paths (#1003).
• Harden worktree removal against partial-state directories (#948).
• Harden worktree sync cleanup to recover from leftover state (#951).
• Naked modify amends in place without prompting for the editor (#1002).
• Handle BatchMarkNeedsPRBodyUpdate errors in scope and describe so failures aren't swallowed (#996).
• Respect STACKIT_NO_LOGGING=0 / =false as logging-on (#998).
• Clean up release blockers before shipping a stack (#1003).

Performance

• Speed up checkout resolution and use native git for checkout paths (#963, #964).
• Optimize bounded log rendering and cache interactive log branches/offsets for faster log views (#930, #931, #933).
• Speed up common read-only views across the engine (#982).
• Cache parent revision on BranchState; drop redundant IsUpToDate re-read (#957).
• Cache worktree list during branch cleanup, restack batches, and merge plans (#984, #987, #988).
• Batch all ref deletions in engine.DeleteBranches, batch local stack metadata ref deletion, and push deleted metadata refs once per cleanup pass (#985, #990, #991).
• Snapshot metadata ref SHAs once per restack batch and expose new SHA on RestackBranchResult to skip per-branch GetRevision (#993, #994).
• Short-circuit branch-deletion planning with fast tree-equality plus timing logs (#999).
• Instrument metadata cache hits/misses and batch loads (#956).

Refactors

• Unify editor command launching across CLI surfaces (#929).
• Submit: merge allCreates check into the branchInfos loop (#939).
• Replace private stdlib wrappers with direct stdlib calls (#952).
• Remove unused parameter and dead variable (#965).
• Make branch collections first-class and finish the branch-collection migration (#967, #968).
• Model worktree list as a typed WorktreeList (#986).

Docs

• Refresh perf plans (#983).
• Improve stack-create workflow guidance for agents (#937).

Chore

• Instrument executeDeletions with per-step timing (#997).
• Add LoadMode equivalence and concurrency tests for the engine (#961).
• Update Go and frontend dependencies (#941, #942, #943, #946, #947, #966).

What's Changed

• refactor(submit): merge allCreates check into branchInfos loop by @jonnii in #939
• fix(move): let interactive users resolve conflicts and continue by @jonnii in #940
• docs(agent): improve stack-create workflow by @jonnii in #937
• fix(restack): exclude trunk from restack plans by @jonnii in #938
• chore(deps): update Go dependencies by @jonnii in #941
• Merging 2 PRs by @jonnii in #944
• chore(deps): update Go dependencies by @jonnii in #942
• chore(deps): update web dependencies by @jonnii in #943
• chore(deps): update web dependencies by @jonnii in #947
• chore(deps): update Go dependencies by @jonnii in #946
• fix(restack): detach HEAD before conflict-workflow rebase by @jonnii in #953
• fix(restack): classify branches by validation result, not spec position by @jonnii in #954
• Merging 4 PRs by @jonnii in #955
• fix: harden worktree removal by @jonnii in #948
• feat: anchor managed worktrees by @jonnii in #949
• feat: add worktree repair and status output by @jonnii in #950
• fix: harden worktree sync cleanup by @jonnii in #951
• refactor: unify editor command launching by @jonnii in #929
• perf: instrument metadata cache hits/misses and batch-loads by @jonnii in #956
• perf: cache parent revision on BranchState; drop IsUpToDate re-read by @jonnii in #957
• refactor: replace private stdlib wrappers with direct stdlib calls by @jonnii in #952
• test(engine): add LoadMode equivalence and concurrency tests by @jonnii in #961
• Merging 3 PRs by @jonnii in #962
• perf: optimize bounded log rendering by @jonnii in #930
• perf: cache interactive log branches by @jonnii in #931
• perf: cache interactive log line offsets by @jonnii in #933
• perf: use native git for checkout paths by @jonnii in #963
• chore: update Go and frontend dependencies to latest versions by @jonnii in #966
• refactor: remove unused parameter and dead variable by @jonnii in #965
• Merging 3 PRs by @jonnii in #969
• perf: speed up checkout resolution by @jonnii in #964
• refactor: make branch collections first-class by @jonnii in #967
• refactor: finish branch collection migration by @jonnii in #968
• Merging 3 PRs by @jonnii in #973
• fix(merge): surface DeleteBranch failures during ship cleanup by @jonnii in #970
• fix(merge): drop remote metadata ref when ship deletes a branch by @jonnii in #971
• fix(git): handle packed refs in DeleteBranch and DeleteRef by @jonnii in #972
• feat: add worktree run command by @jonnii in #974
• perf: speed up common read-only views by @jonnii in #982
• Merging 5 PRs by @jonnii in #989
• perf: cache worktree list during branch cleanup by @jonnii in #984
• perf: batch all ref deletions in engine.DeleteBranches by @jonnii in #985
• refactor: model worktree list as a typed WorktreeList by @jonnii in #986
• perf: snapshot worktree list once per restack batch by @jonnii in #987
• perf: snapshot worktree list once per merge plan by @jonnii in #988
• Merging 2 PRs by @jonnii in #992
• perf: push deleted metadata refs once per cleanup pass by @jonnii in #990
• perf: batch local stack metadata ref deletion by @jonnii in #991
• docs: refresh perf plans by @jonnii in #983
• Merging 2 PRs by @jonnii in #995
• perf: snapshot metadata ref SHAs once per restack batch by @jonnii in #993
• perf: expose new SHA on RestackBranchResult to skip per-branch GetRevision by @jonnii in https://github.com/getsta...

Contributors

• @jonnii

Patch release fixing a data race in the git runner.

Highlights

• Fixed a data race in the git runner where concurrent reads of runner.repoRoot could race with writes, occasionally causing flaky behavior under parallel command execution.

Fixes

• Guarded runner.repoRoot reads with repoMu to fix a data race (#934).

Chore

• Bumped goreleaser wait timeout to 1200s in the create-release skill (#932).

What's Changed

• chore(create-release): bump goreleaser wait timeout to 1200s by @jonnii in #932
• fix(git): guard runner.repoRoot reads with repoMu to fix data race by @jonnii in #934

Full Changelog: v0.17.14...v0.17.15

Contributors

• @jonnii

A maintenance release focused on faster sync, smoother restacks, and better resilience when GitHub-side squash merges leave the stack in unexpected states.

Highlights

• Faster remote operations on large stacks. Metadata pushes, PR base updates, and metadata-ref deletions are now batched and parallelized, cutting overhead from O(N ×ばつ roundtrip) to roughly O(1) for many common workflows (#918, #916).
• Quieter no-op commands. restack, flatten, submit, and foreach now skip the TUI entirely when there's nothing to do, so commands that resolve to no work no longer flash a transient progress UI (#919).
• Sync handles user-induced inconsistencies. When a user manually deletes a merged parent branch, sync now reparents stranded children onto the correct ancestor instead of leaving an orphaned stack (#921).
• Module renamed to github.com/getstackit/stackit. The Go import path moved to the canonical org location. CLI users are unaffected; Go importers need to update their imports (#928).

Fixes

• Skip the restack TUI when there's no work to do, and avoid leaking OSC 11 terminal queries on every CLI invocation (#919).
• Respect the caller's context in the ResetTrunkToRemote fallback fetch path so cancellations propagate correctly (#917).
• Point the agents-block link in docs to the repo instead of stackit.dev (#926).

Performance

• Batch and parallelize remote metadata pushes and PR base updates during submit/sync (#918).
• Batch metadata ref deletion in Reset instead of issuing one git command per ref (#916).

Refactors

• Extract the shared apply path for describe to make future describe-adjacent commands easier to add (#923).
• Extract MetadataTx state-check logic into a helper (#924).

Docs

• Align the GitHub integration page with the real workflow template (#927).

Chore

• Rename module to github.com/getstackit/stackit (#928).
• Add pressure tests for GitHub-side squash merge edge cases in sync (#921).
• Reorganize and speed up the test suites (#925).
• Update backend dependencies (#922).

What's Changed

• perf: batch metadata ref deletion in Reset by @jonnii in #916
• fix: respect caller context in ResetTrunkToRemote fallback fetch by @jonnii in #917
• perf: batch and parallelize remote metadata + PR base updates by @jonnii in #918
• fix(restack): skip TUI when restack has no work to do by @jonnii in #919
• test(sync): add pressure tests for GitHub-side squash merge by @jonnii in #921
• refactor: extract MetadataTx state check into helper by @jonnii in #924
• refactor(describe): extract shared apply path by @jonnii in #923
• chore: update backend dependencies by @jonnii in #922
• test: reorganize and speed up test suites by @jonnii in #925
• fix: point agents-block link to repo instead of stackit.dev by @jonnii in #926
• chore: rename module to github.com/getstackit/stackit by @jonnii in #928
• docs: align github integration page with real workflow template by @jonnii in #927

Full Changelog: v0.17.13...v0.17.14

Contributors

• @jonnii

Highlights

• Added --message-file / -F flag to stackit create, modify, squash, and split,
  mirroring git commit -F. Use -F path or -F - to read messages from a file or stdin —
  keeps Bash command lines stable across runs so a single permission rule covers every commit
  message in agent harnesses.
• Reshaped Codex skill output as a first-class product surface. Codex skills
  (~/.codex/skills/) now ship with their own descriptions corpus, slim router, frontmatter
  rewrites, and override tree — Claude templates remain byte-identical.
• Streaming restack progress updates: long-running restacks now report progress live instead
  of waiting for the whole operation to finish.

Features

• Added --message-file (-F) flag to create, modify, squash, and split for stable
  message input from files or stdin (#901).
• Reshaped Codex skills with per-skill descriptions, transform pipeline (model: stripping,
  allowed-tools filtering, ~/.claude path rewriting, !...`` macro removal, AskUserQuestion
  rewriting), and templates/codex_overrides/ precedence tree (#909).

Fixes

• Streamed restack progress updates so long-running restacks no longer appear to hang
  (#910).
• Detected dumb terminals, added Wait to Sender, and renamed the restack progress label
  (#905).
• Used explicit force-with-lease SHA when pushing branches to avoid stale-ref races (#897).
• Deduped flatten restack targets so children aren't restacked multiple times in the same
  run (#896).
• Validated split flags before any I/O so invalid combinations fail fast without draining
  stdin or opening files (#903).
• Hardened --message-file handling: empty-input errors, TTY guard on -, clearer
  mutex/missing-file error messages, and errors.Is(fs.ErrNotExist) support (#902).

Performance

• Reused validated restack commits to skip redundant work when commits are already in the
  right state (#907).
• Ported validated restack special cases to the shared fast path (#908).

Refactors

• Shared best-effort action snapshots across CLI commands (#892).
• Shared CLI checkout navigation helpers (#891).
• Shared CLI branch argument resolution (#890).
• Centralized stack graph access (#889).
• Shared branch comparison revision resolution (#888).
• Shared PR navigation renderer (#887).
• Dropped the command prefix from agent templates and project rules — Claude's
  non-interactive Bash sandbox doesn't expand aliases, so the prefix only doubled the
  permission match surface (#898, #899).

Docs

• Added "Keeping Permission Rules Stable" guidance to the stackit workflow rule, covering
  one-command-per-Bash-call, no 2>&1 appending, and stdin/file-based message input (#900).
• Clarified scoped restack agent wording (#886).
• Dogfooded -F - across 20 agent template sites and AGENTS.md workflow examples (#903).

Chore

• Updated Go and backend dependencies (#893, #913).
• Updated web/frontend dependencies (#894, part of #913).

What's Changed

• Merging 2 PRs by @jonnii in #895
• chore: update backend dependencies by @jonnii in #893
• chore: update frontend dependencies by @jonnii in #894
• Merging 6 PRs by @jonnii in #904
• refactor: drop command prefix from agent templates by @jonnii in #898
• refactor: drop command prefix from project rules and AGENTS.md by @jonnii in #899
• docs: add permission-stability guidance for stackit workflow by @jonnii in #900
• feat: add --message-file flag to create/modify/squash/split by @jonnii in #901
• fix: harden --message-file handling and broaden test coverage by @jonnii in #902
• fix: validate split flags before I/O and dogfood -F - in templates by @jonnii in #903
• Merging 2 PRs by @jonnii in #906
• fix: dedupe flatten restack targets by @jonnii in #896
• fix: use explicit force-with-lease sha by @jonnii in #897
• fix: detect dumb terminals, add Wait to Sender, rename restack label by @jonnii in #905
• feat: reshape Codex skills as a first-class product surface by @jonnii in #909
• Merging 2 PRs by @jonnii in #911
• perf: reuse validated restack commits by @jonnii in #907
• refactor: port validated restack special cases by @jonnii in #908
• fix: stream restack progress updates by @jonnii in #910
• Merging 7 PRs by @jonnii in #912
• docs: clarify scoped restack agent wording by @jonnii in #886
• refactor: share PR navigation renderer by @jonnii in #887
• refactor: share branch comparison revision resolution by @jonnii in #888
• refactor: centralize stack graph access by @jonnii in #889
• refactor: share CLI branch argument resolution by @jonnii in #890
• refactor: share CLI checkout navigation helpers by @jonnii in #891
• refactor: share best-effort action snapshots by @jonnii in #892
• chore: update web dependencies by @jonnii in #914
• chore: update Go dependencies by @jonnii in #913

Full Changelog: v0.17.11...v0.17.13

Contributors

• @jonnii

Re-tag for expired credentials.

This release focuses on safer multi-stack automation, better restack and foreach targeting, improved conflict handling, and a cleaner web diff explorer.

Highlights

• Added multi-stack restack support with stackit restack --all-stacks and --stacks <roots>.
• Added stackit restack --parallel with --jobs to process independent stack groups in
  parallel worktrees.
• Added stackit restack --continue-on-conflict so conflicted stacks can be reported
  without blocking unrelated independent stacks.
• Added multi-stack foreach targeting with stackit foreach --all-stacks, --stacks, and
  --branch.
• Added stackit foreach --json, including per-branch status, output, errors, and exit
  codes.
• Added stackit foreach --find-first-failure to run branches by stack depth and stop after
  the first failing layer.
• Improved conflict reporting by showing conflict marker line ranges and clearer resolution
  instructions.
• Added git rerere integration for restack/sync flows, including auto-continuing rebases
  when rerere resolves conflicts.
• Replaced the web diff file explorer with @pierre/trees, improving file tree behavior and
  status display.

Fixes

• Preserved divergence points across delete, fold, reorder, split, get, flatten, and
  worktree reparenting paths.
• Fixed flatten/reparent behavior so branches only carry their own commits after structural
  changes.
• Fixed restack parallel conflict handling so worker cleanup does not destroy conflict state
  or under-report failed groups.
• Hardened stack automation error handling.
• Fixed sync dry-run JSON by adding would_restack_stacks for planning scoped restacks.
• Closed API logger resources, drained SSE clients, and tracked the ref watcher goroutine
  during shutdown.

Developer And Docs

• Updated restack docs and agent templates to prefer explicit scoped commands such as
  stackit restack --upstack.
• Added JSON stack_root / stack_roots annotations for multi-stack restack output.
• Updated Go and frontend dependencies, including Next.js, TypeScript, Vitest, lucide-react,
  @pierre/diffs, and new @pierre/trees.

Notes

stackit restack --parallel now requires --all-stacks or --stacks, since parallel
restack operates across independent stack groups

What's Changed

• Merging 4 PRs by @jonnii in #855
• test(flatten): add commit integrity tests to verify branches only contain their own commits after flatten by @jonnii in #851
• fix(flatten): propagate UpdateParentRevision error instead of silently swallowing it by @jonnii in #852
• refactor(engine): add SetParentName, fix SetParentPreservingDivergence, fix pluck child reparenting, add commit integrity tests by @jonnii in #853
• chore: update go and frontend dependencies by @jonnii in #858
• feat(git): auto-continue rerere-resolved rebases by @jonnii in #860
• feat(actions): show conflict marker line ranges by @jonnii in #859
• docs(cli): update stack-fix and stack-restack agent templates by @jonnii in #861
• refactor(merge): simplify multistack discovery logic by @jonnii in #862
• Merging 18 PRs by @jonnii in #882
• feat(foreach): improve foreach action and add tests by @jonnii in #863
• feat(foreach): add foreach events and dry-run support by @jonnii in #864
• feat(foreach): add stack range filtering and parallel execution by @jonnii in #865
• feat(restack): improve restack with better CLI flags and add tests by @jonnii in #866
• docs(cli): update stack-fix agent template by @jonnii in #867
• docs(cli): update stack-verify agent template by @jonnii in #868
• docs(cli): update stack-absorb agent template by @jonnii in #869
• docs(cli): update stack-sync agent template by @jonnii in #870
• docs(cli): update stack-status agent template by @jonnii in #871
• docs(cli): update skill templates to use scoped restack commands by @jonnii in #872
• feat(sync): add would_restack_stacks to dry-run JSON for restack planning by @jonnii in #873
• feat(foreach): add --all-stacks and --stacks multi-stack scope flags by @jonnii in #874
• feat(restack): add --parallel flag to run independent stacks in parallel worktrees by @jonnii in #875
• feat(restack): annotate JSON output with stack_root per branch for multi-stack grouping by @jonnii in #876
• docs: update restack examples to use scoped flags across user-facing docs by @jonnii in #877
• fix: harden stack automation error handling by @jonnii in #878
• docs: clarify would_restack_stacks must be recomputed after sync before restack by @jonnii in #880
• feat(web): replace diff file explorer with @pierre/trees by @jonnii in #879
• fix(api): close logger, drain SSE clients, and track watcher goroutine on shutdown by @jonnii in #881
• fix(restack): stop parallel worker from destroying conflict state and under-reporting failed groups by @jonnii in #883
• refactor(restack): typed ConflictMode and parallelResultCollector by @jonnii in #884
• fix: harden foreach and reparent release prep by @jonnii in #885

Full Changelog: v0.17.10...v0.17.11

Contributors

• @jonnii