an opinionated terminal multiplexer in C with programmable pane chrome https://git.sl0p.foo/slosh.git/atom/src/app_session.c?h=v0.1.1 2026-08-26T14:11:42Z 2026-08-26T14:11:42Z user user@clank 2026-08-26T14:11:42Z urn:sha1:087b2bd1d31dac24f8b0ffe79c33f4ebf1f60bd3 Portability fixes contributed by our macOS developer, applied with one hardening tweak (below). Darwin has no /proc, so everything that read one gets the native answer: live_cwd via proc_pidinfo(PROC_PIDVNODEPATHINFO), the foreground command via sysctl(KERN_PROCARGS2) parsed back into the NUL-separated shape /proc/<pid>/cmdline gives, and SLOSH_BIN via _NSGetExecutablePath plus realpath. The pty gets its winsize set on the slave after opening it, because Darwin attaches no line discipline to the master until then and the earlier TIOCSWINSZ was silently dropped -- a pane born 0x0. The shader repl binds tab in libedit's own words, since macOS ships Python's readline as a libedit wrapper that accepts GNU syntax in silence. Two finds are cross-platform bugs: a toast wider than the screen minus the gap computed a negative x that uint16_t made ~65533, drawing the longest messages -- the ones most worth reading -- off screen; now the middle is elided (a path's tail is the half you needed) and x clamps. And a pane label was 128 bytes, which a Homebrew interpreter's full path exceeds before its arguments even start; dump-layout wrote the truncation down and a restore ran it, so it is 1024 now. Saving a layout learned cwd_as_named: the kernel answers with the physical path, and on macOS /tmp is a symlink to /private/tmp, so a layout that said cwd="/tmp" stopped round-tripping through a save. If realpath(named) is where the pane still is, the named spelling wins. Tests follow: realpath'd tmpdirs, the scroll test reads the shell's first prompt instead of spelling out bash 5.3, and wrapped pane text is joined before matching a long path. One tweak on top of the contribution: the elision needs five columns for a head, the dots and a tail -- below that `avail - 3` goes negative, and negative as size_t is a pointer into the weeds; a terminal that narrow gets a plain clip. 2026-08-20T21:53:43Z user user@clank 2026-08-20T21:53:43Z urn:sha1:64db2051192a6a6f5a9333f503d14b1ccccd699d A dumped session quietly re-tiled its floats, which was the one data-loss gap left in D22. dump-layout now records `floating=true x= y= w= h=` -- the *wanted* rect, because intent is what survives a session and the next screen's layout clamps it like any frame -- layout files declare the same (linted: floating is a bool, x/y/w/h mean nothing without it), and a file whose every pane floats self-heals through ensure_tiled: the top float lands, the same rule closing the last tiled pane follows, no lint required. save-workspace inherits all of it from the shared dumper. `float` over the API takes x/y/w/h and then *places* rather than toggles -- a placement is a statement about where, not about whether -- floating the pane first when it is tiled, re-placing when it already floats, with omitted fields meaning "keep". The intent is stored exactly as asked: the write-back rule is for hands, whose drags need the clamp to agree with the eye; a script means what it typed. And kitty graphics respect the stack. The cell compositor gets occlusion free from paint order, but placements are sent after the diff and would paint an image straight over a float covering it. Each pane's placements are now clipped by the float rects above it -- every float for a tiled pane, the higher-raised for a float -- cropping what one clean edge can express (the pane-edge source-rectangle arithmetic aimed at another clipper, including from the top and left, where the source origin moves and the sub-cell offset is consumed) and suppressing what it cannot: a strip across the middle or a corner overlap leaves a shape one placement cannot say, and the image returns whole when the float moves. No z= needed -- clipping is the z-order, since nothing is ever allowed to overlap. D22's "still owed" paragraph is paid and rewritten; M10 is fully checked. 2026-08-19T13:25:28Z user user@clank 2026-08-19T13:25:28Z urn:sha1:49ac13f70aa3a9224e90699fe68d8463909239db The old name argued that the extension should say how to read the file. The argument lost to a collision: zellij speaks the same KDL syntax under that same extension with a different schema, and to anyone arriving from there .kdl said *whose* file it is -- naming the wrong owner is worse than not naming the parser. So a layout is x.layout, a project's is slosh.layout, the name says what the file is and --check says how it was read. (It is still KDL underneath; point your editor's highlighting at *.layout.) Nobody's checked-in workspace vanishes on upgrade: the project scan still finds slosh.layout.kdl, never writes it, and where both spellings exist the new one wins, because two files disagreeing needs one answer. The unparseable-file heuristic in --check learned the new suffix -- it matched '.layout.' with a trailing dot, which the new name no longer has. The webdemo overlay moves with it (demo.layout), rebuilt and boot-checked. 2026-08-19T11:47:10Z user user@clank 2026-08-19T11:47:10Z urn:sha1:ffaf9ff9db77573612317882b96158b5c7ba9655 app.c was 7k lines wearing section markers; now the markers are files, cut exactly along them, no behaviour change: app.c the session core: config in force, pane and tab lifecycle, walking, input routing, introspection app_layout.c layout, tree edits, resizing, equalising, rotating, focus app_session.c layout files, checking, workspaces, dumping a session app_draw.c drawing, the shader passes, kitty graphics app_ui.c the finder, modals, the palette, the project picker, renaming include/app_internal.h carries what the five share: the tree/tab/app structs, CFG and the palette macros, and the 50-odd formerly static functions the cut made cross-unit, declared where they are defined. They keep their names; only the five units see the header. One test moved with the code: test_portable_layouts' staleness check greps the source for the layouts section, which now lives in app_session.c. Mechanical, so blame for anything in the four new files continues in app.c before this commit.