Drop-in Guarantees

rninja's compatibility with Ninja.

Full Compatibility

Build Files

• Reads .ninja files
• Same syntax
• Same semantics

CLI Flags

Flag	Support
-C, -f, -j, -k	Full
-l, -n, -v, -d	Full
-t, -w	Full

Subtools

All Ninja subtools supported:

• clean, compdb, deps
• graph, query, targets
• restat, recompact

File Formats

File	Compatible
build.ninja	Yes
.ninja_log	Yes
.ninja_deps	Yes

Exit Codes

Same as Ninja:

• 0: Success
• 1: Build failed
• 2: Invalid arguments

Additions (Non-Breaking)

rninja adds:

• --json output
• --trace profiling
• --no-daemon mode
• Cache subtools

These are extensions, not changes.

Migration

Replace ninja with rninja:

ln -s $(which rninja) /usr/local/bin/ninja

No other changes needed.