fix!: replace harness checkpoints with provider-native rewind#62

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Merged
Tryanks merged 1 commit into from
Jul 18, 2026
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fix!: replace harness checkpoints with provider-native rewind #62

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12 changes: 12 additions & 0 deletions .github/workflows/release.yml
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -226,6 +226,18 @@ jobs:
set -euo pipefail
notes_file="$(mktemp)"
cat > "$notes_file" <<'NOTES'
## Upgrade note: legacy turn checkpoints

Tcode no longer creates hidden Git checkpoint refs. If you used a build that included
turn checkpoints, run this once inside each affected repository to remove the old refs:

```sh
git for-each-ref --format='delete %(refname)' refs/tcode/checkpoints/ | git update-ref --stdin
```

This does not change branches, commits, the index, or workspace files. The unreferenced
snapshot objects become eligible for Git's normal garbage collection.

## Platform notes

- **macOS 12+**: these test builds are not signed or notarized. After moving the app to Applications, clear Gatekeeper quarantine with:
Expand Down
14 changes: 1 addition & 13 deletions CONTRIBUTING.md
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -88,19 +88,7 @@ without touching your real threads.
`--debug-image <path>`, `--debug-live`, `--debug-send <text>`,
`--debug-palette <query>`,
`--debug-settings-section <general|providers|orchestrate|archived>`,
`--debug-queue "msg1|msg2"`, `--debug-edit-open`.

`--debug-edit-resend "<text>"` exercises **Edit & resend** end to end (rewind the
worktree from the turn's git checkpoint, truncate the transcript, roll the
provider session back, send a new turn) — something you cannot drive by hovering
a bubble headlessly:

```sh
git init /tmp/er
cargo run -- --smoke "claude|/tmp/er|Create agent.txt containing hello."
cargo run -- --debug-edit-resend "Create edited.txt containing bye."
# agent.txt is gone; the transcript starts at the edited message; edited.txt exists.
```
`--debug-queue "msg1|msg2"`.

## Code layout

Expand Down
10 changes: 5 additions & 5 deletions README.md
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -29,7 +29,7 @@ squinting at scrollback.
Tcode is a desktop layer over the agent CLIs already installed on your machine.
It spawns them, speaks their native protocols, and adds the things a terminal
can't: threads that persist, rendered diffs, a readable approval panel, and a
rewind button for when the agent goes the wrong way.
native provider actions when the underlying CLI exposes them.

It does **not** replace your agent, proxy your API keys, or run a server. Your
accounts, subscriptions, models and tooling keep working exactly as they do
Expand All@@ -41,10 +41,10 @@ today — Tcode just drives them.
project. Close the app, reopen it, keep talking — the agent resumes where it left
off.

**Rewind.** Before every turn, Tcode snapshots your working tree into a hidden
git ref. Agent went sideways? Revert to any earlier message and the files come
back with it. Or edit that message and resend: the transcript *and* the working
tree rewind to that point, and the new turn runs from there.
**Provider-native rewind.** Claude Code sessions expose Claude's own checkpoint
options for restoring code, conversation, or both. Tcode forwards those native
operations and records the confirmed result; it does not snapshot your Git
working tree or synthesize rollback for providers that lack the capability.

**Diffs, not scrollback.** Syntax-highlighted per-turn diffs in a resizable
split, with a changed-files card on each turn.
Expand Down
12 changes: 12 additions & 0 deletions crates/agent/src/acp.rs
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -870,6 +870,18 @@ async fn handle_command(
// Build/Plan is a session *mode* in ACP; the traits picker drives it
// through `SetOption` (`acp:mode`).
}
SessionCommand::Rewind {
checkpoint_id,
mode,
} => {
let _ = events
.send(AgentEvent::RewindFailed {
checkpoint_id,
mode,
error: "this ACP agent does not advertise a native rewind operation".into(),
})
.await;
}
SessionCommand::Shutdown => unreachable!("handled by the caller"),
}
}
Expand Down
Loading
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

Skip to content
fix!: replace harness checkpoints with provider-native rewind#62

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to your account

 Merged

Tryanks
merged 1 commit into

from

Jul 18, 2026
 Merged


fix!: replace harness checkpoints with provider-native rewind
#62
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12 changes: 12 additions & 0 deletions
.github/workflows/release.yml

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -226,6 +226,18 @@ jobs:
 set -euo pipefail
 notes_file="$(mktemp)"
 cat > "$notes_file" <<'NOTES'
 ## Upgrade note: legacy turn checkpoints

 Tcode no longer creates hidden Git checkpoint refs. If you used a build that included
 turn checkpoints, run this once inside each affected repository to remove the old refs:

 ```sh
 git for-each-ref --format='delete %(refname)' refs/tcode/checkpoints/ | git update-ref --stdin
 ```

 This does not change branches, commits, the index, or workspace files. The unreferenced
 snapshot objects become eligible for Git's normal garbage collection.

 ## Platform notes

 - **macOS 12+**: these test builds are not signed or notarized. After moving the app to Applications, clear Gatekeeper quarantine with:
Expand Down

14 changes: 1 addition & 13 deletions
CONTRIBUTING.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -88,19 +88,7 @@ without touching your real threads.
`--debug-image <path>`, `--debug-live`, `--debug-send <text>`,
`--debug-palette <query>`,
`--debug-settings-section <general|providers|orchestrate|archived>`,
`--debug-queue "msg1|msg2"`, `--debug-edit-open`.

`--debug-edit-resend "<text>"` exercises **Edit & resend** end to end (rewind the
worktree from the turn's git checkpoint, truncate the transcript, roll the
provider session back, send a new turn) — something you cannot drive by hovering
a bubble headlessly:

```sh
git init /tmp/er
cargo run -- --smoke "claude|/tmp/er|Create agent.txt containing hello."
cargo run -- --debug-edit-resend "Create edited.txt containing bye."
# agent.txt is gone; the transcript starts at the edited message; edited.txt exists.
```
`--debug-queue "msg1|msg2"`.

## Code layout

Expand Down

10 changes: 5 additions & 5 deletions
README.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -29,7 +29,7 @@ squinting at scrollback.
Tcode is a desktop layer over the agent CLIs already installed on your machine.
It spawns them, speaks their native protocols, and adds the things a terminal
can't: threads that persist, rendered diffs, a readable approval panel, and a
rewind button for when the agent goes the wrong way.
native provider actions when the underlying CLI exposes them.

It does **not** replace your agent, proxy your API keys, or run a server. Your
accounts, subscriptions, models and tooling keep working exactly as they do
Expand All@@ -41,10 +41,10 @@ today — Tcode just drives them.
project. Close the app, reopen it, keep talking — the agent resumes where it left
off.

**Rewind.** Before every turn, Tcode snapshots your working tree into a hidden
git ref. Agent went sideways? Revert to any earlier message and the files come
back with it. Or edit that message and resend: the transcript *and* the working
tree rewind to that point, and the new turn runs from there.
**Provider-native rewind.** Claude Code sessions expose Claude's own checkpoint
options for restoring code, conversation, or both. Tcode forwards those native
operations and records the confirmed result; it does not snapshot your Git
working tree or synthesize rollback for providers that lack the capability.

**Diffs, not scrollback.** Syntax-highlighted per-turn diffs in a resizable
split, with a changed-files card on each turn.
Expand Down

12 changes: 12 additions & 0 deletions
crates/agent/src/acp.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -870,6 +870,18 @@ async fn handle_command(
 // Build/Plan is a session *mode* in ACP; the traits picker drives it
 // through `SetOption` (`acp:mode`).
 }
 SessionCommand::Rewind {
 checkpoint_id,
 mode,
 } => {
 let _ = events
 .send(AgentEvent::RewindFailed {
 checkpoint_id,
 mode,
 error: "this ACP agent does not advertise a native rewind operation".into(),
 })
 .await;
 }
 SessionCommand::Shutdown => unreachable!("handled by the caller"),
 }
}
Expand Down
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
fix!: replace harness checkpoints with provider-native rewind#62

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Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

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By clicking “Sign up for GitHub”, you agree to our terms of service and
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Already on GitHub?
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to your account

 Merged

Tryanks
merged 1 commit into

from

Jul 18, 2026
 Merged


fix!: replace harness checkpoints with provider-native rewind
#62
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12 changes: 12 additions & 0 deletions
.github/workflows/release.yml

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -226,6 +226,18 @@ jobs:
 set -euo pipefail
 notes_file="$(mktemp)"
 cat > "$notes_file" <<'NOTES'
 ## Upgrade note: legacy turn checkpoints

 Tcode no longer creates hidden Git checkpoint refs. If you used a build that included
 turn checkpoints, run this once inside each affected repository to remove the old refs:

 ```sh
 git for-each-ref --format='delete %(refname)' refs/tcode/checkpoints/ | git update-ref --stdin
 ```

 This does not change branches, commits, the index, or workspace files. The unreferenced
 snapshot objects become eligible for Git's normal garbage collection.

 ## Platform notes

 - **macOS 12+**: these test builds are not signed or notarized. After moving the app to Applications, clear Gatekeeper quarantine with:
Expand Down

14 changes: 1 addition & 13 deletions
CONTRIBUTING.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -88,19 +88,7 @@ without touching your real threads.
`--debug-image <path>`, `--debug-live`, `--debug-send <text>`,
`--debug-palette <query>`,
`--debug-settings-section <general|providers|orchestrate|archived>`,
`--debug-queue "msg1|msg2"`, `--debug-edit-open`.

`--debug-edit-resend "<text>"` exercises **Edit & resend** end to end (rewind the
worktree from the turn's git checkpoint, truncate the transcript, roll the
provider session back, send a new turn) — something you cannot drive by hovering
a bubble headlessly:

```sh
git init /tmp/er
cargo run -- --smoke "claude|/tmp/er|Create agent.txt containing hello."
cargo run -- --debug-edit-resend "Create edited.txt containing bye."
# agent.txt is gone; the transcript starts at the edited message; edited.txt exists.
```
`--debug-queue "msg1|msg2"`.

## Code layout

Expand Down

10 changes: 5 additions & 5 deletions
README.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -29,7 +29,7 @@ squinting at scrollback.
Tcode is a desktop layer over the agent CLIs already installed on your machine.
It spawns them, speaks their native protocols, and adds the things a terminal
can't: threads that persist, rendered diffs, a readable approval panel, and a
rewind button for when the agent goes the wrong way.
native provider actions when the underlying CLI exposes them.

It does **not** replace your agent, proxy your API keys, or run a server. Your
accounts, subscriptions, models and tooling keep working exactly as they do
Expand All@@ -41,10 +41,10 @@ today — Tcode just drives them.
project. Close the app, reopen it, keep talking — the agent resumes where it left
off.

**Rewind.** Before every turn, Tcode snapshots your working tree into a hidden
git ref. Agent went sideways? Revert to any earlier message and the files come
back with it. Or edit that message and resend: the transcript *and* the working
tree rewind to that point, and the new turn runs from there.
**Provider-native rewind.** Claude Code sessions expose Claude's own checkpoint
options for restoring code, conversation, or both. Tcode forwards those native
operations and records the confirmed result; it does not snapshot your Git
working tree or synthesize rollback for providers that lack the capability.

**Diffs, not scrollback.** Syntax-highlighted per-turn diffs in a resizable
split, with a changed-files card on each turn.
Expand Down

12 changes: 12 additions & 0 deletions
crates/agent/src/acp.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -870,6 +870,18 @@ async fn handle_command(
 // Build/Plan is a session *mode* in ACP; the traits picker drives it
 // through `SetOption` (`acp:mode`).
 }
 SessionCommand::Rewind {
 checkpoint_id,
 mode,
 } => {
 let _ = events
 .send(AgentEvent::RewindFailed {
 checkpoint_id,
 mode,
 error: "this ACP agent does not advertise a native rewind operation".into(),
 })
 .await;
 }
 SessionCommand::Shutdown => unreachable!("handled by the caller"),
 }
}
Expand Down
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
fix!: replace harness checkpoints with provider-native rewind#62

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Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

 Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and
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Already on GitHub?
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to your account

 Merged

Tryanks
merged 1 commit into

from

Jul 18, 2026
 Merged


fix!: replace harness checkpoints with provider-native rewind
#62
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12 changes: 12 additions & 0 deletions
.github/workflows/release.yml

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -226,6 +226,18 @@ jobs:
 set -euo pipefail
 notes_file="$(mktemp)"
 cat > "$notes_file" <<'NOTES'
 ## Upgrade note: legacy turn checkpoints

 Tcode no longer creates hidden Git checkpoint refs. If you used a build that included
 turn checkpoints, run this once inside each affected repository to remove the old refs:

 ```sh
 git for-each-ref --format='delete %(refname)' refs/tcode/checkpoints/ | git update-ref --stdin
 ```

 This does not change branches, commits, the index, or workspace files. The unreferenced
 snapshot objects become eligible for Git's normal garbage collection.

 ## Platform notes

 - **macOS 12+**: these test builds are not signed or notarized. After moving the app to Applications, clear Gatekeeper quarantine with:
Expand Down

14 changes: 1 addition & 13 deletions
CONTRIBUTING.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -88,19 +88,7 @@ without touching your real threads.
`--debug-image <path>`, `--debug-live`, `--debug-send <text>`,
`--debug-palette <query>`,
`--debug-settings-section <general|providers|orchestrate|archived>`,
`--debug-queue "msg1|msg2"`, `--debug-edit-open`.

`--debug-edit-resend "<text>"` exercises **Edit & resend** end to end (rewind the
worktree from the turn's git checkpoint, truncate the transcript, roll the
provider session back, send a new turn) — something you cannot drive by hovering
a bubble headlessly:

```sh
git init /tmp/er
cargo run -- --smoke "claude|/tmp/er|Create agent.txt containing hello."
cargo run -- --debug-edit-resend "Create edited.txt containing bye."
# agent.txt is gone; the transcript starts at the edited message; edited.txt exists.
```
`--debug-queue "msg1|msg2"`.

## Code layout

Expand Down

10 changes: 5 additions & 5 deletions
README.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -29,7 +29,7 @@ squinting at scrollback.
Tcode is a desktop layer over the agent CLIs already installed on your machine.
It spawns them, speaks their native protocols, and adds the things a terminal
can't: threads that persist, rendered diffs, a readable approval panel, and a
rewind button for when the agent goes the wrong way.
native provider actions when the underlying CLI exposes them.

It does **not** replace your agent, proxy your API keys, or run a server. Your
accounts, subscriptions, models and tooling keep working exactly as they do
Expand All@@ -41,10 +41,10 @@ today — Tcode just drives them.
project. Close the app, reopen it, keep talking — the agent resumes where it left
off.

**Rewind.** Before every turn, Tcode snapshots your working tree into a hidden
git ref. Agent went sideways? Revert to any earlier message and the files come
back with it. Or edit that message and resend: the transcript *and* the working
tree rewind to that point, and the new turn runs from there.
**Provider-native rewind.** Claude Code sessions expose Claude's own checkpoint
options for restoring code, conversation, or both. Tcode forwards those native
operations and records the confirmed result; it does not snapshot your Git
working tree or synthesize rollback for providers that lack the capability.

**Diffs, not scrollback.** Syntax-highlighted per-turn diffs in a resizable
split, with a changed-files card on each turn.
Expand Down

12 changes: 12 additions & 0 deletions
crates/agent/src/acp.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -870,6 +870,18 @@ async fn handle_command(
 // Build/Plan is a session *mode* in ACP; the traits picker drives it
 // through `SetOption` (`acp:mode`).
 }
 SessionCommand::Rewind {
 checkpoint_id,
 mode,
 } => {
 let _ = events
 .send(AgentEvent::RewindFailed {
 checkpoint_id,
 mode,
 error: "this ACP agent does not advertise a native rewind operation".into(),
 })
 .await;
 }
 SessionCommand::Shutdown => unreachable!("handled by the caller"),
 }
}
Expand Down
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

Skip to content
fix!: replace harness checkpoints with provider-native rewind#62

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

 Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and
privacy statement. We’ll occasionally send you account related emails.

Already on GitHub?
Sign in
to your account

 Merged

Tryanks
merged 1 commit into

from

Jul 18, 2026
 Merged


fix!: replace harness checkpoints with provider-native rewind
#62
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12 changes: 12 additions & 0 deletions
.github/workflows/release.yml

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -226,6 +226,18 @@ jobs:
 set -euo pipefail
 notes_file="$(mktemp)"
 cat > "$notes_file" <<'NOTES'
 ## Upgrade note: legacy turn checkpoints

 Tcode no longer creates hidden Git checkpoint refs. If you used a build that included
 turn checkpoints, run this once inside each affected repository to remove the old refs:

 ```sh
 git for-each-ref --format='delete %(refname)' refs/tcode/checkpoints/ | git update-ref --stdin
 ```

 This does not change branches, commits, the index, or workspace files. The unreferenced
 snapshot objects become eligible for Git's normal garbage collection.

 ## Platform notes

 - **macOS 12+**: these test builds are not signed or notarized. After moving the app to Applications, clear Gatekeeper quarantine with:
Expand Down

14 changes: 1 addition & 13 deletions
CONTRIBUTING.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -88,19 +88,7 @@ without touching your real threads.
`--debug-image <path>`, `--debug-live`, `--debug-send <text>`,
`--debug-palette <query>`,
`--debug-settings-section <general|providers|orchestrate|archived>`,
`--debug-queue "msg1|msg2"`, `--debug-edit-open`.

`--debug-edit-resend "<text>"` exercises **Edit & resend** end to end (rewind the
worktree from the turn's git checkpoint, truncate the transcript, roll the
provider session back, send a new turn) — something you cannot drive by hovering
a bubble headlessly:

```sh
git init /tmp/er
cargo run -- --smoke "claude|/tmp/er|Create agent.txt containing hello."
cargo run -- --debug-edit-resend "Create edited.txt containing bye."
# agent.txt is gone; the transcript starts at the edited message; edited.txt exists.
```
`--debug-queue "msg1|msg2"`.

## Code layout

Expand Down

10 changes: 5 additions & 5 deletions
README.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -29,7 +29,7 @@ squinting at scrollback.
Tcode is a desktop layer over the agent CLIs already installed on your machine.
It spawns them, speaks their native protocols, and adds the things a terminal
can't: threads that persist, rendered diffs, a readable approval panel, and a
rewind button for when the agent goes the wrong way.
native provider actions when the underlying CLI exposes them.

It does **not** replace your agent, proxy your API keys, or run a server. Your
accounts, subscriptions, models and tooling keep working exactly as they do
Expand All@@ -41,10 +41,10 @@ today — Tcode just drives them.
project. Close the app, reopen it, keep talking — the agent resumes where it left
off.

**Rewind.** Before every turn, Tcode snapshots your working tree into a hidden
git ref. Agent went sideways? Revert to any earlier message and the files come
back with it. Or edit that message and resend: the transcript *and* the working
tree rewind to that point, and the new turn runs from there.
**Provider-native rewind.** Claude Code sessions expose Claude's own checkpoint
options for restoring code, conversation, or both. Tcode forwards those native
operations and records the confirmed result; it does not snapshot your Git
working tree or synthesize rollback for providers that lack the capability.

**Diffs, not scrollback.** Syntax-highlighted per-turn diffs in a resizable
split, with a changed-files card on each turn.
Expand Down

12 changes: 12 additions & 0 deletions
crates/agent/src/acp.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -870,6 +870,18 @@ async fn handle_command(
 // Build/Plan is a session *mode* in ACP; the traits picker drives it
 // through `SetOption` (`acp:mode`).
 }
 SessionCommand::Rewind {
 checkpoint_id,
 mode,
 } => {
 let _ = events
 .send(AgentEvent::RewindFailed {
 checkpoint_id,
 mode,
 error: "this ACP agent does not advertise a native rewind operation".into(),
 })
 .await;
 }
 SessionCommand::Shutdown => unreachable!("handled by the caller"),
 }
}
Expand Down
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
fix!: replace harness checkpoints with provider-native rewind#62

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 Merged

Tryanks
merged 1 commit into

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Jul 18, 2026
 Merged


fix!: replace harness checkpoints with provider-native rewind
#62
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12 changes: 12 additions & 0 deletions
.github/workflows/release.yml

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -226,6 +226,18 @@ jobs:
 set -euo pipefail
 notes_file="$(mktemp)"
 cat > "$notes_file" <<'NOTES'
 ## Upgrade note: legacy turn checkpoints

 Tcode no longer creates hidden Git checkpoint refs. If you used a build that included
 turn checkpoints, run this once inside each affected repository to remove the old refs:

 ```sh
 git for-each-ref --format='delete %(refname)' refs/tcode/checkpoints/ | git update-ref --stdin
 ```

 This does not change branches, commits, the index, or workspace files. The unreferenced
 snapshot objects become eligible for Git's normal garbage collection.

 ## Platform notes

 - **macOS 12+**: these test builds are not signed or notarized. After moving the app to Applications, clear Gatekeeper quarantine with:
Expand Down

14 changes: 1 addition & 13 deletions
CONTRIBUTING.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -88,19 +88,7 @@ without touching your real threads.
`--debug-image <path>`, `--debug-live`, `--debug-send <text>`,
`--debug-palette <query>`,
`--debug-settings-section <general|providers|orchestrate|archived>`,
`--debug-queue "msg1|msg2"`, `--debug-edit-open`.

`--debug-edit-resend "<text>"` exercises **Edit & resend** end to end (rewind the
worktree from the turn's git checkpoint, truncate the transcript, roll the
provider session back, send a new turn) — something you cannot drive by hovering
a bubble headlessly:

```sh
git init /tmp/er
cargo run -- --smoke "claude|/tmp/er|Create agent.txt containing hello."
cargo run -- --debug-edit-resend "Create edited.txt containing bye."
# agent.txt is gone; the transcript starts at the edited message; edited.txt exists.
```
`--debug-queue "msg1|msg2"`.

## Code layout

Expand Down

10 changes: 5 additions & 5 deletions
README.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -29,7 +29,7 @@ squinting at scrollback.
Tcode is a desktop layer over the agent CLIs already installed on your machine.
It spawns them, speaks their native protocols, and adds the things a terminal
can't: threads that persist, rendered diffs, a readable approval panel, and a
rewind button for when the agent goes the wrong way.
native provider actions when the underlying CLI exposes them.

It does **not** replace your agent, proxy your API keys, or run a server. Your
accounts, subscriptions, models and tooling keep working exactly as they do
Expand All@@ -41,10 +41,10 @@ today — Tcode just drives them.
project. Close the app, reopen it, keep talking — the agent resumes where it left
off.

**Rewind.** Before every turn, Tcode snapshots your working tree into a hidden
git ref. Agent went sideways? Revert to any earlier message and the files come
back with it. Or edit that message and resend: the transcript *and* the working
tree rewind to that point, and the new turn runs from there.
**Provider-native rewind.** Claude Code sessions expose Claude's own checkpoint
options for restoring code, conversation, or both. Tcode forwards those native
operations and records the confirmed result; it does not snapshot your Git
working tree or synthesize rollback for providers that lack the capability.

**Diffs, not scrollback.** Syntax-highlighted per-turn diffs in a resizable
split, with a changed-files card on each turn.
Expand Down

12 changes: 12 additions & 0 deletions
crates/agent/src/acp.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -870,6 +870,18 @@ async fn handle_command(
 // Build/Plan is a session *mode* in ACP; the traits picker drives it
 // through `SetOption` (`acp:mode`).
 }
 SessionCommand::Rewind {
 checkpoint_id,
 mode,
 } => {
 let _ = events
 .send(AgentEvent::RewindFailed {
 checkpoint_id,
 mode,
 error: "this ACP agent does not advertise a native rewind operation".into(),
 })
 .await;
 }
 SessionCommand::Shutdown => unreachable!("handled by the caller"),
 }
}
Expand Down
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
fix!: replace harness checkpoints with provider-native rewind#62

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

 Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and
privacy statement. We’ll occasionally send you account related emails.

Already on GitHub?
Sign in
to your account

 Merged

Tryanks
merged 1 commit into

from

Jul 18, 2026
 Merged


fix!: replace harness checkpoints with provider-native rewind
#62
Show file tree
Hide file tree
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Commits

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Filter by extension
Conversations

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Failed to load files. 
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12 changes: 12 additions & 0 deletions
.github/workflows/release.yml

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -226,6 +226,18 @@ jobs:
 set -euo pipefail
 notes_file="$(mktemp)"
 cat > "$notes_file" <<'NOTES'
 ## Upgrade note: legacy turn checkpoints

 Tcode no longer creates hidden Git checkpoint refs. If you used a build that included
 turn checkpoints, run this once inside each affected repository to remove the old refs:

 ```sh
 git for-each-ref --format='delete %(refname)' refs/tcode/checkpoints/ | git update-ref --stdin
 ```

 This does not change branches, commits, the index, or workspace files. The unreferenced
 snapshot objects become eligible for Git's normal garbage collection.

 ## Platform notes

 - **macOS 12+**: these test builds are not signed or notarized. After moving the app to Applications, clear Gatekeeper quarantine with:
Expand Down

14 changes: 1 addition & 13 deletions
CONTRIBUTING.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -88,19 +88,7 @@ without touching your real threads.
`--debug-image <path>`, `--debug-live`, `--debug-send <text>`,
`--debug-palette <query>`,
`--debug-settings-section <general|providers|orchestrate|archived>`,
`--debug-queue "msg1|msg2"`, `--debug-edit-open`.

`--debug-edit-resend "<text>"` exercises **Edit & resend** end to end (rewind the
worktree from the turn's git checkpoint, truncate the transcript, roll the
provider session back, send a new turn) — something you cannot drive by hovering
a bubble headlessly:

```sh
git init /tmp/er
cargo run -- --smoke "claude|/tmp/er|Create agent.txt containing hello."
cargo run -- --debug-edit-resend "Create edited.txt containing bye."
# agent.txt is gone; the transcript starts at the edited message; edited.txt exists.
```
`--debug-queue "msg1|msg2"`.

## Code layout

Expand Down

10 changes: 5 additions & 5 deletions
README.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -29,7 +29,7 @@ squinting at scrollback.
Tcode is a desktop layer over the agent CLIs already installed on your machine.
It spawns them, speaks their native protocols, and adds the things a terminal
can't: threads that persist, rendered diffs, a readable approval panel, and a
rewind button for when the agent goes the wrong way.
native provider actions when the underlying CLI exposes them.

It does **not** replace your agent, proxy your API keys, or run a server. Your
accounts, subscriptions, models and tooling keep working exactly as they do
Expand All@@ -41,10 +41,10 @@ today — Tcode just drives them.
project. Close the app, reopen it, keep talking — the agent resumes where it left
off.

**Rewind.** Before every turn, Tcode snapshots your working tree into a hidden
git ref. Agent went sideways? Revert to any earlier message and the files come
back with it. Or edit that message and resend: the transcript *and* the working
tree rewind to that point, and the new turn runs from there.
**Provider-native rewind.** Claude Code sessions expose Claude's own checkpoint
options for restoring code, conversation, or both. Tcode forwards those native
operations and records the confirmed result; it does not snapshot your Git
working tree or synthesize rollback for providers that lack the capability.

**Diffs, not scrollback.** Syntax-highlighted per-turn diffs in a resizable
split, with a changed-files card on each turn.
Expand Down

12 changes: 12 additions & 0 deletions
crates/agent/src/acp.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -870,6 +870,18 @@ async fn handle_command(
 // Build/Plan is a session *mode* in ACP; the traits picker drives it
 // through `SetOption` (`acp:mode`).
 }
 SessionCommand::Rewind {
 checkpoint_id,
 mode,
 } => {
 let _ = events
 .send(AgentEvent::RewindFailed {
 checkpoint_id,
 mode,
 error: "this ACP agent does not advertise a native rewind operation".into(),
 })
 .await;
 }
 SessionCommand::Shutdown => unreachable!("handled by the caller"),
 }
}
Expand Down
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

Skip to content
fix!: replace harness checkpoints with provider-native rewind#62

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

 Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and
privacy statement. We’ll occasionally send you account related emails.

Already on GitHub?
Sign in
to your account

 Merged

Tryanks
merged 1 commit into

from

Jul 18, 2026
 Merged


fix!: replace harness checkpoints with provider-native rewind
#62
Show file tree
Hide file tree
 Changes from all commits
Commits

Show all changes


1 commit


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Filter by extension
Filter by extension
Conversations

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Jump to

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Failed to load files. 
Loading
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 Diff view


12 changes: 12 additions & 0 deletions
.github/workflows/release.yml

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -226,6 +226,18 @@ jobs:
 set -euo pipefail
 notes_file="$(mktemp)"
 cat > "$notes_file" <<'NOTES'
 ## Upgrade note: legacy turn checkpoints

 Tcode no longer creates hidden Git checkpoint refs. If you used a build that included
 turn checkpoints, run this once inside each affected repository to remove the old refs:

 ```sh
 git for-each-ref --format='delete %(refname)' refs/tcode/checkpoints/ | git update-ref --stdin
 ```

 This does not change branches, commits, the index, or workspace files. The unreferenced
 snapshot objects become eligible for Git's normal garbage collection.

 ## Platform notes

 - **macOS 12+**: these test builds are not signed or notarized. After moving the app to Applications, clear Gatekeeper quarantine with:
Expand Down

14 changes: 1 addition & 13 deletions
CONTRIBUTING.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -88,19 +88,7 @@ without touching your real threads.
`--debug-image <path>`, `--debug-live`, `--debug-send <text>`,
`--debug-palette <query>`,
`--debug-settings-section <general|providers|orchestrate|archived>`,
`--debug-queue "msg1|msg2"`, `--debug-edit-open`.

`--debug-edit-resend "<text>"` exercises **Edit & resend** end to end (rewind the
worktree from the turn's git checkpoint, truncate the transcript, roll the
provider session back, send a new turn) — something you cannot drive by hovering
a bubble headlessly:

```sh
git init /tmp/er
cargo run -- --smoke "claude|/tmp/er|Create agent.txt containing hello."
cargo run -- --debug-edit-resend "Create edited.txt containing bye."
# agent.txt is gone; the transcript starts at the edited message; edited.txt exists.
```
`--debug-queue "msg1|msg2"`.

## Code layout

Expand Down

10 changes: 5 additions & 5 deletions
README.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -29,7 +29,7 @@ squinting at scrollback.
Tcode is a desktop layer over the agent CLIs already installed on your machine.
It spawns them, speaks their native protocols, and adds the things a terminal
can't: threads that persist, rendered diffs, a readable approval panel, and a
rewind button for when the agent goes the wrong way.
native provider actions when the underlying CLI exposes them.

It does **not** replace your agent, proxy your API keys, or run a server. Your
accounts, subscriptions, models and tooling keep working exactly as they do
Expand All@@ -41,10 +41,10 @@ today — Tcode just drives them.
project. Close the app, reopen it, keep talking — the agent resumes where it left
off.

**Rewind.** Before every turn, Tcode snapshots your working tree into a hidden
git ref. Agent went sideways? Revert to any earlier message and the files come
back with it. Or edit that message and resend: the transcript *and* the working
tree rewind to that point, and the new turn runs from there.
**Provider-native rewind.** Claude Code sessions expose Claude's own checkpoint
options for restoring code, conversation, or both. Tcode forwards those native
operations and records the confirmed result; it does not snapshot your Git
working tree or synthesize rollback for providers that lack the capability.

**Diffs, not scrollback.** Syntax-highlighted per-turn diffs in a resizable
split, with a changed-files card on each turn.
Expand Down

12 changes: 12 additions & 0 deletions
crates/agent/src/acp.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -870,6 +870,18 @@ async fn handle_command(
 // Build/Plan is a session *mode* in ACP; the traits picker drives it
 // through `SetOption` (`acp:mode`).
 }
 SessionCommand::Rewind {
 checkpoint_id,
 mode,
 } => {
 let _ = events
 .send(AgentEvent::RewindFailed {
 checkpoint_id,
 mode,
 error: "this ACP agent does not advertise a native rewind operation".into(),
 })
 .await;
 }
 SessionCommand::Shutdown => unreachable!("handled by the caller"),
 }
}
Expand Down
Loading