Use this template for writing the :
```markdown
## Summary
<diagram, diff-sketch, or tree>
## Evidence
- **Before:** <screenshot/output/failing test run>
**After:** <screenshot/output/passing test run>
## Merge Danger
**Door:** <one-way or two-way>
<optional: description>
**:** <>
<optional: potential ramifications of merge>
```
## Sections
Skip all preambles and keep prose brief. Use the user's domain language from `GLOSSARY.md`.
### Summary
Pick .
- Show logic or an algorithm as pseudocode:
```text
on(save)
if content is unchanged
return cached result
write new content
return fresh result
```
- Show runtime control flow as a call tree:
```text
submitForm
createSession
persistPrompt
launchAgent
navigateToSession
```
- Show UI structure as a component tree, including state and module boundaries that matter:
```text
<SessionPage> (apps/example/src/routes/session.tsx)
useSessionEvents()
<SessionToolbar>
<RunSkillButton> (packages/ui)
```
- Show file responsibility or a broad refactor as a shallow file tree:
```text
src/
├── commands/ # parses user actions
├── sessions/ # owns session state
└── transport/ # sends API requests
```
- Show component interaction, control flow, or data flow with Mermaid:
```mermaid
sequenceDiagram
participant User
participant UI
participant Daemon
User->>UI: choose command
UI->>Daemon: send expanded prompt
Daemon-->>UI: stream result
```
- Use `diff` when the point is what changes and . Match the diff shape to the topic.
For a component change:
```diff
<SessionPage>
useSessionEvents()
<SessionToolbar>
+ <RunSkillButton />
<SessionTimeline>
+ <SkillResultCard />
```
For a file-layout change:
```diff
src/
├── commands/
+│ └── show-me.ts # expands the slash command
├── sessions/
-└── transport.ts
+└── transport/
+ ├── client.ts
+ └── stream.ts
```
For a call-tree or call-stack change:
```diff
submitForm
createSession
persistPrompt
+ expandSkillMention
launchAgent
- navigateToSession
+ navigateToSession
+ subscribeToEvents
```
For a state or control-flow change:
```diff
on(save)
- write content
+ if content is unchanged
+ return cached result
+ write new content
+ invalidate cache
```
- Show the whole block when most of it is new, when , or when the user needs :
```ts
function expandSkill(command: string): string {
const skillName = command.slice(1);
return `use the ${skillName} skill`;
}
```
#### Guidance
Place each visual next to the short text it supports. Keep only the calls, files, props, states, and boundaries needed to answer the user's current question or the options to resolve the current discussion point.
You may use one of these, you may use several, it is unlikely you will use all of them. Use your judgement and .
### Evidence
that the change works. Show a .
- when the environment is set up for it and the change is visual.
. Test results, console output. Show the exact test that now fails and passes, using pseudocode.
### Merge Danger
Describe whether it's a . You can walk back through two-way doors, but not one-way doors. A PR that is is lower risk. Changes that involve destructive actions or hard-to-reverse decisions are one-way doors.
The is the potential impact or scope of the changes introduced by this PR. Consider all possibilities. Examples are layout shift, breakages for consumers, mobile responsiveness, etc.