diff --git a/.changeset/opencode-v1-14-51-to-v1-15-4.md b/.changeset/opencode-v1-14-51-to-v1-15-4.md
new file mode 100644
index 0000000000..f878d88641
--- /dev/null
+++ b/.changeset/opencode-v1-14-51-to-v1-15-4.md
@@ -0,0 +1,55 @@
+---
+"@kilocode/cli": patch
+"kilo-code": patch
+---
+
+Changes from opencode v1.14.51 to v1.15.4 upstream:
+
+## Core
+
+### Improvements
+
+- Added an Effect-based core event system for more complete event delivery across sessions and integrations.
+- Clarified how to recover when the npm package is installed without its native binary.
+- Reduced unnecessary prompting around shell, task, and todo flows.
+
+### Bugfixes
+
+- Ignored invalid exports in custom tool modules instead of failing tool loading.
+- Ignored project instruction lookup errors so sessions keep loading when project instruction discovery fails.
+- Fixed versioned event projector lookups so event replay uses the right handlers.
+- Avoid duplicate consecutive entries in prompt history.
+- Show full config validation errors during TUI startup instead of a generic failure.
+- Fixed npm installs so the CLI can recover and fetch the right native binary on more setups.
+- Fixed multiline `@` mentions in prompts.
+- Preserved custom tool metadata from Zod schemas.
+- Preserved custom tool argument descriptions in generated schemas.
+- Fixed file watching in repos where `.git` is a symlink. (@kagura-agent)
+- Fixed sync events not reaching project-scoped subscribers in injected instances.
+- Reduced wasted work when reading very large files after output truncation.
+- Fixed project-scoped bus events so file watcher and update notifications reach the right instance.
+- Fixed custom LSP servers not sending refresh events after they initialize.
+- Hid background subagent task instructions unless experimental background mode is enabled.
+
+## SDK
+
+### Bugfixes
+
+- Restored missing event types in the JavaScript SDK, including session and message events.
+
+## TUI
+
+### Improvements
+
+- Added a collapsed thinking view that can be expanded inline.
+- Added pinned sessions with quick-switch slots in the session picker.
+- Newly pinned sessions now stay at the end of the pinned list instead of jumping to the top.
+- Made Markdown H1 headings easier to distinguish.
+
+### Bugfixes
+
+- Fixed thinking mode defaults so reasoning starts collapsed consistently.
+- Limited session quick-switching to pinned sessions.
+- Fixed Markdown table rendering in chat output.
+- Fixed `opencode run --agent` resolving project-local agents.
+- Fixed async commands losing the active instance context, which could break agent generation and GitHub-driven runs.