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A terminal's tag said Tty whatever shell it ran. The host's acknowledgement
of the shell it forked now sets the word to Tty+<shell>, tinted like the tag's
name. Word+arg is taken as Word arg, one word a tag can hold and a click can
take whole (+ is a word character), so Tty+fish opens a terminal on fish, as
Tty fish does; Tty takes the shell as its argument, which the host forks for
that pane instead of the configured one. Every snapshot whose screen shows a
terminal's tag changes: 69 goldens, re-recorded by name, whose 297 changed
lines are all Tty becoming Tty+bash (the harness runs bash), the cursor
columns and style spans that moved with it, or that text cut at a pane's
width.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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shell's prompt
A middle click, an exec write or a tag word that no builtin knows was typed
into some terminal for the pane's directory, sharing whatever state that
shell was in and answering nothing, so a misspelling vanished into a shell.
Now only a line clicked at an interactive terminal's prompt is typed there.
From anywhere else it runs as a command pane: a terminal whose child is
$SHELL -c the line in the pane's directory, full emulation, which shows its
output and then exit N from the host's reaping of the child, and stays. A
finished command pane is the next command's for its directory, which runs
below what it showed after a '% line' line (acme appends to +Errors and never
clears it, util.c:213); a running one gets a second pane. Kill ends a command
pane's whole process group, the log records run and exit, exec reads back the
command pane's serial, and a line is at most 1 KB, read off the pane as the
host forks rather than carried in every spawn effect. ttyForDir's search for
a free shell is gone. The goldens of chordcut, cmdword and layout-open change
where a file's exec now opens a command pane, and ttytaken is rewritten to
exec from the terminal itself; docs/open-questions.md records the decision.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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request is served
serveFs expired them, but a read is answered while a step is out in a
syscall, because reads change nothing, and this one changed pane messages
and needs_frame from under the step. The detached session's loop now expires
them between steps, and while nobody is attached and a message is up it
looks again every 100 ms rather than waiting for something to wake it.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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/a/;/b/ searches b from the end of a (acme's addr.c:170-171 sets ar to the
left side), and /a/,/b/ searches both from the current address; the review
asked that it be confirmed, and it held.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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reader too
A line written to the root's look or exec is a click at the pane with the
keyboard, and in acme every click on a window whose event file is open goes
to its reader; the root's acted at once. It now goes to the reader as the
pane's own does. The docs say what that means for a helper holding event
(its own exec comes back as a record: run it through ctl, or write the
record back), and why an event record counts bytes where acme counts runes:
every offset pardes serves is in bytes, #n and q0/q1 too, so the count
follows them rather than switch alone, and an acme library reads it right
for ASCII text.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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Restore happened
The answer gets 200 ms to leave before the connections are cut, so a slow
client may see only the cut; the new log's 'restore <path>' record is what to
trust.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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The Restore marked the connections to cut in cloud9's Conn.user, which cloud9
also writes, clearing it for a connection accepted into that slot on another
task: a client dialling in as the marks were made could be marked old and
cut. Each connection is now stamped from a counter as it opens (cloud9's
opened hook), and a Restore cuts those stamped before its own count; nothing
is written from two tasks.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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Exit and Restore shared one warned-at revision, so a Restore a script was
refused over ctl spent the warning, and the person's next Exit quit without
asking, throwing the text away. The warning now records which word gave it,
and only that word goes ahead on it.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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The served README, the skill and docs/fs.md now say where an address search
starts, that an event record's text may hold newlines and is read by its
count, that truncating tag clears its default words too (append to keep them,
u in the tag to get them back), how Dump and Restore behave and where dumps
go, that Kill stops only the foreground job (the rest of 'sleep 30; echo done'
still runs) and that Joincol needs a column to the right. The skill and
fs.md had Collapse as a column word; it folds the pane it is given.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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A message lingers until input dismisses it, and a detached session with nobody
attached has no input: its messages, and /screen, kept what was said long ago.
The session now marks the core unattended while no client is attached, and
the core drops a pane's messages once the newest has been up MessageLinger on
the clock, checked as it is stepped or served. A pane's older lines go with
its newest rather than each on its own clock; the render pipeline's clock is
the place for that.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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Both did nothing without a word, from a click or a ctl write alike, and a
script could not tell a no-op from success. Joincol in the rightmost column
now fails 'Joincol: no column to the right'. A Theme name that is none says so
and names the themes sharing its first letter, since all of them (ThemeSel
lists them) are too many for a message or a refused write; a startup config
line still fails quietly, as its other bad lines do.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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and the error words keep it so
The served README said every refused write reads as EINVAL, but a mount's
errno is 9ns's reading of the error's words, so a no-match or out-of-range
address and a refused Exit came back EIO, as the dogfood run saw. That split
is the useful one, malformed against failed, so the docs now state it rather
than the words being bent to EINVAL; a test pins each error's words to its
side of it. It caught one: 'regular expression search took too long' read as
ENAMETOOLONG, and now says it gave up past its step budget.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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After a pane made by Tty or Newcol written to a ctl, /look and /exec still
read the serials of the last look or exec, and a script took the old pane for
the new one. A ctl write now resets them and records what each line made, or
else the pane it ran at, as a look or exec does.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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stat said a terminal's body was 0 bytes while a read gave its screen and
history, and the docs promise real sizes; a client that sizes its read from
stat got nothing. The length is now that of the text a read answers, counted
the way the pane's ctl line already counts it.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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is refused
-/re/ searched forward, since only ?re? set the direction, where acme's
address() takes the direction a minus set (addr.c). And #100,#50 was taken,
leaving data to act on an empty range at 100; sam refuses it as 'addresses out
of order', which acme leaves out, and so does pardes now. The rest of the
dogfood report on addresses already held and is now tested: an expression is
evaluated from the current address, as acme evaluates it from w->addr
(xfid.c:446), so a search starts where the last address or data write left
it and . is that address. Taking . as the selection instead, as the report
asked, would part from acme, which has dot only in its ctl messages; the docs
say which is which.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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are tested for their offsets
Dogfooding saw a body right-click reported as ML0 0 2 3 qty. On file panes
the offsets were right in every case tried here (a scratch made over 9P and
clicked while another pane is active, after a hover, scrolled, soft-wrapped,
tab-indented, inside parentheses); the test now holds them. The 0 0 form
is a terminal's body, which has no offsets to give (its body is a history
snapshot); since the event file now takes a record back whole, such a record
can still be written back and done, and the docs say so. What the test did
find: a click on whitespace sent an empty record, where acme's look3 and
execute return without a word on an empty expansion (look.c:37, exec.c:141).
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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the pane
A script writing to pane/N/exec bypassed the client holding that pane's event
file, which a middle click on it would not: acme sends a window's clicks to its
event reader (look.c:53, exec.c:173). Such a line is now an F record at 0 0
carrying its text; the root's look and exec still act at once. acme takes back
only origin, action and range, which a record with no place in the text cannot
use, so the whole record as read is taken too, and for an empty range acts on
its text.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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and restores
A client that wrote Restore saw its connection cut with no answer, and could
not tell a Restore from a crash. The listener now lets the writer's answer out
before the cut, and cuts only the old editor's connections, refusing their
requests meanwhile; a client that dials during it is the new editor's and
stays. Dump logs 'dump <path>' and the restored editor's log 'restore <path>'.
Keeping connections across a Restore was weighed and left: the fids name the
old editor's panes and opens, so it would mean carrying serials and open
records into the new one, where acme's Load only adds windows. tty's Restore
also closed its shells' ptys without reaping them; it retires them now.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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not windows and a repeat cap
The windows returned wrong matches: a candidate reaching a window's edge was
left to the next window, half a window on, which could answer a match starting
mid-token rather than the leftmost, and addr then pointed data's next write at
the wrong bytes. The repeat cap missed mvzr's own worst case, a chain of a?,
and alternation under a repeat, each exponential inside one mvzr call the
deadline could not interrupt; and it refused ordinary s/S patterns. build.zig
now patches the fetched mvzr at build time with a step counter on its
backtracking recursion (matchPattern), so a fresh fetch keeps it and a moved
anchor stops the build; regexp.zig gives each compiled pattern a budget, about
300 ms here, and a search that spends it fails as taking too long. Windows,
the cap and their special cases are gone, and matches are exact again.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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'<name>: Modified' read like a failure to retry, and a script that retried
Exit or Restore threw the text away without knowing it. The refusal now names
the word asking and what repeating it does, '<name>: Modified (Exit again to
discard)', and the skill sets it apart from lock's 'file in use', which is
the one to retry.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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Restore replaces every pane with a dump's, so a pane edited since its last save
lost that text without a word, where Exit asks. acme's Load only adds a dump's
windows and so never asks; Restore now asks what Exit asks (acme's rowclean and
winclean, wind.c:511-529): each modified pane says so once, and Restore again
with nothing edited since goes ahead. Exit and Restore share the check and its
warned-at revision, as acme's winclean clears one dirty flag for any asker.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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waiting pty/run is cancelled
Review asked the docs to say what a script trips on: acme ignores OTRUNC on
data (fsys.c:543), so truncating it is an extension; addr sits past each write,
so a second echo x > data inserts after the first; and a pty/run line waiting
for a fresh terminal's first prompt waits for ever if none is drawn, so the way
out is to interrupt the read. The lock's retry advice was already there.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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A client retrying a write that fails the same way pushed one err line after
another until the log's ring held nothing else. The same err as the newest
record is now that record with a count, (x4), as +Messages counts repeats; a
follower that has already read the record still gets each repeat as its own
line, since it may be waiting on exactly that.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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Kill queued a signal effect for later, so the job it saw running by its marks
could have ended, and another started, before the signal went; and with job
control off the job shares the shell's process group, so the host skipped it
and Kill reported nothing. Kill now calls the host's kill_job while it holds the
turn, and when the only job is the shell's own group says 'Kill: no job to
signal', which also fails a write of Kill to ctl.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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the hangup
tty and macOS hung the pty up and called waitpid once without waiting, so a shell
still exiting, or one that ignores SIGHUP, stayed a zombie or ran on with nobody
reading it; tty also never reaped a shell that exited by itself, and its spawn
into an occupied slot closed the old pty without ending the shell. host_io's
retireShell says hangup, waits 100 ms on a thread (macOS has no host timer to
poll from), then kills and reaps. The gui's own retired list, when full, left the
slot holding the old shell and refused the next spawn into that pane; it now
hands that shell to retireShell instead.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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windowed, 300 ms deadline
mvzr backtracks with no bound on its work (a*a*a*a*x over a hundred a's takes a
second, each repeat multiplying by the haystack length), and a search runs holding
the editor's turn, so one pasted pattern froze the editor. pardes does not write or
vendor a regex engine, so regexp.zig bounds what it hands mvzr: more than four
repeats is refused, a line longer than a window sized from measured worst cases is
searched in half-overlapping windows, and a deadline stops the search. addr names
each failure; normal s/S keeps what it found. The prescan also stops reading an
escaped backslash before n as a newline, and ends a class where mvzr does.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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Kill quit the editor, which in acme is Exit; acme's Kill stops the
commands it started. Exit now quits as acme's does (exec.c, rowclean):
it refuses once, naming each pane with unsaved text, and quits when
asked again with nothing edited since (a small scratch is not asked
about). Kill, bare or with names, stops the commands pardes typed into a
terminal (an exec, a middle click, a pty/run) while their shell's marks
say they run, by SIGTERM to the terminal's foreground job, never to the
shell (acme posts the kill note, which terminates). Both are session
builtins; the topbar's Kill becomes Exit, same width, and every golden's
topbar row changed by exactly that word (checked line by line); the
builtins script scrolls one more row for the index's new line.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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The sam-style calling convention for mvzr (a line per haystack, . made
[^\\n] only when a pattern names \\n) lived in addr.zig; normal mode's s
and S called mvzr over the raw selection, where ^ meant the selection's
start and . crossed lines. src/regexp.zig now holds the one Regex
(compile, find) both call, and fs.zig and pardes.zig drop an unused mvzr
import. hxdiff and hxparity stay at their known 17 and 6 mismatches, none
of them regex cases.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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A first-time user through a mount could not find how to get a terminal,
read path++text as a typo, did not know > on data replaces only the
addressed range, which regexps addr takes, that lock fails fast, what
errors is, where an unknown exec word goes (typed into a terminal, not an
error), that new panes are +New and a column's last pane leaves one, or
which 9ns mount other processes can see. The README (still 45 lines),
docs/fs.md and the skill now say.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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The write got EPIPE: Kill set quit, the request waited for the editor to
settle its effects, and the editor quit and cut the connections first.
A write that quits the editor is now answered at once, and the listener
lets pending answers out (up to 200 ms) before it stops the runner.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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the reason
Through a mount every refusal reads as Invalid argument, so a shell user
could not tell a missing regexp match from a bad ctl word. Every write or
truncation the tree refuses or that fails now adds err <serial|-> <file>:
<why> to /log. No per-pane readable error file: acme's errors only takes
text, and one stream is simpler to watch.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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The log said new N / and later del N <cwd> for a terminal, with no rename
in between, though a terminal is named by its directory. setCwd now logs
the rename once the pane has been announced. A terminal's ctl line gave
body length 0 while its body reads its history; it now counts that
history (without keeping a copy).
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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A contended lock parked until the holder unlocked, but through a kernel
or FUSE mount the kernel serialises writes to one file, so the parked
lock held up the holder's own unlock and close on that ctl, and the two
deadlocked. acme's qlock blocks; here the second lock is refused at once
with file in use (EBUSY) and the client retries, and nothing parks on
the lock any more.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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answering busy
A new terminal's shell takes tens of milliseconds to draw its first
prompt, and a run written meanwhile answered busy, so a script's first
command was lost, while pty/status said busy 0. A line written before the
first prompt now waits for it and is sent then (a respawn in between
keeps it waiting for the new shell), and pty/status's third field says
what a run would be told: busy while a command runs or text is typed at
the prompt, not before the first prompt.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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The detached server closed a pane's pty only when the shell was respawned,
hit EOF or the session shut down, so rmdir, Del or Delcol on a terminal
left its shell running with nobody to read it; the tty front end and
macOS did the same. Retiring a terminal pane now emits a close_pty
effect, which each host that runs shells answers by hanging the pty up
and ending the shell (the detached server's and the GUI's existing
retire-and-reap path, and a close plus SIGHUP in the tty and macOS
shells).
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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failed addr leaves no address
addr's regexps ran mvzr over text[from..hi]: ^ and $ anchored only at the
slice's ends, . matched newlines, the search never wrapped, and every
failure read as bad address syntax. The regexps stay mvzr's, called the
way sam searches (editors/acme/regx.c): one line per haystack, so ^ and $
fall at line boundaries and . never crosses a newline; a pattern naming
\\n runs over the whole text with its . made [^\\n]; /re/ wraps unless
limit is set, and ?re? takes the last match before the range. The ceiling
(mvzr's first alternative, not sam's longest) is documented. A failed
address says why (no match for regexp, address out of range, bad regular
expression), and a failed write to addr leaves no address, so data and
xdata refuse until the next good one instead of writing at the old range.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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A shell's echo NEW > data opens data with OTRUNC, and truncate() spliced
the whole body away before the write replaced the addressed range: a
five-byte replacement erased a buffer. data and xdata hold what addr
names, so truncating one now deletes that range and nothing else; > on
data replaces the range and : > data deletes it, and only truncating
body clears the buffer.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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Kill in pardes is acme's Exit, not acme's Kill, which only stops
commands; the README, docs/fs.md and the skill now say so where the root
ctl lists it. Delcol, Collapse and the other column words take a pane's
ctl and act on that pane's column; Newcol and Joincol are the root's.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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in the root listing's natural place
A write to /focus leaves a folded pane folded, as rio keeps current apart
from unhide; while a column or workspace tag has the keyboard no pane
does, so /focus reads empty and every pane's ctl says notcurrent (an
empty read also no longer answers stale staged bytes). focus, ctl and
commands now list after status, and the discovery test checks the root
as a set rather than by position.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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Co-Authored-By: Claude Opus 5.5 <[email protected]>
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selection is on or off
Giving panel and scene effects on/off made every switch a word that takes
an argument, so a middle click on Verbose or PanelSlide with other text
selected passed that text as its value and failed. The click path now
passes a held selection to a switch only when it says on or off, and the
word flips as it did bare; a ctl write is still checked strictly. The
topbarexec golden had been recorded with that failure (Debug clicked with
a sweep opening nothing, the very thing the script says it guards); it
now shows the overlay again.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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argument is refused before anything runs
A ctl write failed only on a malformed line: Mount x reported its error
in the editor while the write succeeded, and a bare Mount failed only as
it ran, after earlier lines of the write. acme's ctl answers a command's
error (editors/acme/xfid.c:700). Builtins now declare requires_arg beside
takes_arg (settings: those with a value to set), and the check refuses a
bare one as wrong #args before any line runs; while a ctl runs, the first
error a builtin reports fails the write, quoted with its line, and the
prompt refusal quotes its line too. Docs say what a failure mid-write
leaves done.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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reads, paneFileNamed, topFileNamed, serialNamed, attrReply, makePane,
events.pending, mtimeOf, versionOf, dirOf, cellOf, shiftBy, flagOf,
stageIndexLine, ctlLen, listenersLen, activeSerial, fontName and
Serials.has each wrapped a line or two used once or twice; the logic now
reads where it is used. Helpers that do several things or are shared
widely (bodyOf, fileOf, dirtyOf, nameOf, kindOf, clip, readRange,
readFlag, pty's answer and waitingRun, nextSerialAfter) stay.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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A script could learn the builtin words only from source or the Help
window. /commands is generated from the registry: one line per builtin,
Word or Word arg, then root or pane for the ctl that takes it, so it is
always this build's own list.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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and reads the settings, a pane's ctl its own
Every builtin could only be clicked, or written to exec, and the settings
could be read only as the Config window's prose. acme keeps window verbs on
a window's ctl, and webfs and upas/fs keep session settings on a root ctl.
Each builtin now declares its scope (scope = .session; settings are all
session, the rest pane), read by the registry. The root /ctl takes session
builtins and reads every setting in the words a write takes, so its read
written back changes nothing (panel and scene effects now take on/off like
the toggles, to make that true); a pane's ctl takes the pane's builtins
beside get, lock and unlock. Writes are checked whole and refused in Plan
9's ctl words (unknown control message "X", wrong #args ...), which 9ns
now maps to EINVAL (cloud9 re-pinned at a8c7a715). A builtin that would
prompt for its argument fails the write instead, and a refusal is answered
at once, not after the frame.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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ctl says whether it is current
Scripts had no way to ask which pane has the keyboard or to give it one.
rio answers both through a window's wctl: its read ends with current or
notcurrent, and a write of current takes the keyboard (rio(4)). A pane's
ctl line now ends the same way, and since there is one keyboard for the
whole tree, /focus reads the focused pane's serial and takes a serial to
move the keyboard there, off any header that had it; a serial no pane has
fails with "no such window". fs-bench's stale readdir check is fixed too.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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Designed by two agents (a designer and an adversarial reviewer) and not yet
implemented; implementation starts in stages, each its own change.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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The tag's computed path, dirty marker and page were out of the keyboard's
reach: its cursor lived in the text after them. It now lives in the tag as
shown, as in acme where the name is ordinary text at the start of the tag, so
`0` goes to the line's start and motions select and yank the path. The path
stays read-only: an edit that would change it is refused and leaves the
cursor where it was, and typing into a file's path drafts a new name as a
click on it does. Sync moves the tag's positions when the prefix changes
length, so a rename or the dirty marker still never moves the cursor off the
text after it.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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A tag is a text like the body, so selecting on a regex and piping act on the
text they are pressed in: a prompt records the text it answers for, the tag
keeps the keyboard while it is typed, and a header's prompt goes on the active
pane's band. `/` still searches the body from anywhere, as acme's Look from a
tag searches the body.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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The workspace and column tags hold nothing but commands, and before they
became texts Enter on one of them ran it: Enter on Newcol made a column.
Since then Enter looked the word up, as it does in a pane's tag, which only
searched for it. It runs it again, and the header lets go of the keyboard
first as a pane tag does.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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