From 791c9572841445b045daada15b1affd7a3e23208 Mon Sep 17 00:00:00 2001
From: Fabio Nunes <52166187+LittleGuava@users.noreply.github.com>
Date: Wed, 4 Nov 2026 22:52:54 -0300
Subject: [PATCH] chore(build): keep only line tables in dev builds (#1260)
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Full debug info made up most of target/: each worktree's build output was 15–30 GB. Dev builds now keep line tables for workspace crates (file:line stays in backtraces) and no debug info for dependencies, which brings a cold `cargo build` to about 9 GB and roughly halves cold build time. A debugger can't show locals any more; re-enable with `--config profile.dev.debug=true` when needed.

Co-authored-by: LittleGuava <52166187+LittleGuava@users.noreply.github.com>
---
 AGENTS.md  | 4 ++--
 Cargo.toml | 6 ++++++
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/AGENTS.md b/AGENTS.md
index 1b667bd8a..54cc95ae4 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -121,8 +121,8 @@ Several worktrees can be developed and run side by side.
   default MCP session belongs to this worktree.
 - Keep each worktree's Cargo output directory separate; do not point `CARGO_TARGET_DIR` or
   `target` symlinks at a shared directory.
-- Each worktree's first build is cold (around 5 minutes) and its Cargo output takes
-  15–30 GB. Avoid running several heavy builds on one machine at the same time.
+- Each worktree's first build is cold (several minutes) and `cargo build` output takes
+  around 9 GB; tests, clippy and incremental builds add more. Avoid running several heavy builds on one machine at the same time.
 - Stop only processes started for the current worktree/session. Never use broad
   process-name kills such as `pkill openidea`.
 - When done: stop that worktree's app and dev session, delete its build output, then
diff --git a/Cargo.toml b/Cargo.toml
index 551afa8c9..ea4e1506d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -117,8 +117,14 @@ tempfile = "3"
 [profile.dev]
 # Keep debug builds snappy while giving dependencies decent speed.
 opt-level = 0
+# Full debug info is most of target/. Line tables keep file:line in our backtraces, but a
+# debugger can't show locals; re-enable with `--config profile.dev.debug=true`.
+debug = "line-tables-only"
 [profile.dev.package."*"]
 opt-level = 2
+# Dependency frames keep function names only. Re-enable one with
+# `--config 'profile.dev.package.<crate>.debug=true'`.
+debug = false
 
 [profile.release]
 codegen-units = 1