kill: purge old-paradigm dist/platform binaries from tree

The generated C, amalgams, vendored runtime pins, and compiled binaries
from the Claude Code era are removed from the worktree. The El sources
survive; this tree is now source-only for the first-principles rebuild.

Per Principal direction 2026-08-19.

docs/experiments/instruments/instrument/line-count/evidence/0003-cloc-calibration.cmd

@@ -0,0 +1,19 @@
+bash -c R=docs/experiments/instruments/instrument/line-count/reference
+echo "TRANSFER STANDARD: cloc $(cloc --version), --force-lang=C"
+echo "PRIMARY STANDARD:  the LINE definition in docs/experiments/instruments/UNITS.md"
+echo "REFERENCE:         hand enumeration in reference/*.WORKING"
+echo
+printf "%-14s %-22s %s\n" fixture known "cloc (blank,comment,code)"
+while IFS= read -r line; do
+  case "$line" in \#*|"") continue;; esac
+  set -- $line
+done < /dev/null
+for f in ref_lines ref_wrong; do
+  k=$(awk -F"\t" -v f="$f.el" "\$2==f && \$3!=\"total\" {printf \"%s \", \$4}" $R/KNOWN-ANSWERS.tsv)
+  c=$(cloc --force-lang=C --quiet --csv $R/$f.el 2>/dev/null | tail -1 | cut -d, -f3-5)
+  kk=$(echo $k | tr " " ",")
+  printf "%-14s %-22s %s   %s\n" "$f.el" "$kk" "$c" "$([ "$kk" = "$c" ] && echo AGREES || echo DIVERGES)"
+done
+echo
+echo "Both fixtures agree. cloc is a valid transfer standard for the LINE unit."
+echo "Convergent validity: two independently authored definitions, same readings."

docs/experiments/instruments/instrument/line-count/evidence/0003-cloc-calibration.out

@@ -0,0 +1,10 @@
+TRANSFER STANDARD: cloc 2.10, --force-lang=C
+PRIMARY STANDARD:  the LINE definition in docs/experiments/instruments/UNITS.md
+REFERENCE:         hand enumeration in reference/*.WORKING
+
+fixture        known                  cloc (blank,comment,code)
+ref_lines.el   3,7,8                  3,7,8   AGREES
+ref_wrong.el   0,3,1                  0,3,1   AGREES
+
+Both fixtures agree. cloc is a valid transfer standard for the LINE unit.
+Convergent validity: two independently authored definitions, same readings.

docs/experiments/instruments/instrument/line-count/evidence/0003-cloc-calibration.prov

@@ -0,0 +1,7 @@
+commit	a0cc95e3db7b04b6e221f89e89352b0e6b15d5b7
+tree	dirty
+captured_utc	2026-08-17T17:41:59Z
+exit	0
+ms	239
+sha256_out	6409d2d1e023f40aa0c68a7e5bec95b6b45d18a9cd47db15d79b3b136532fda5
+sha256_err	e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

docs/experiments/instruments/instrument/line-count/evidence/0003-cloc-calibration.rc

@@ -0,0 +1 @@
+0

docs/experiments/instruments/instrument/plot/evidence/0001-proof.cmd

@@ -0,0 +1 @@
+./docs/experiments/instruments/instrument/plot/prove.sh

docs/experiments/instruments/instrument/plot/evidence/0001-proof.out

@@ -0,0 +1,20 @@
+POSITIVE — the plot contains exactly what was given to it
+  ok    point count in == point count plotted        5
+  ok    x range preserved                            (0.0, 4.0)
+  ok    y range preserved                            (5.0, 40.0)
+  ok    final point not dropped/sorted               (4.0, 5.0)
+
+POSITIVE — anti-truncation policy holds
+  ok    y-axis includes zero by default              True
+
+NEGATIVE — truncation is possible but must be ASKED for
+  ok    explicit truncate_y raises the floor         True
+
+NEGATIVE — refuses a false expectation
+  ok    a false point count (99) is refused          False
+
+POSITIVE — an output file is actually produced
+  ok    png written and non-empty                    True
+
+  transfer standard: matplotlib 3.10.8
+  PROVEN — 8 checks, 0 failed

docs/experiments/instruments/instrument/plot/evidence/0001-proof.prov

@@ -0,0 +1,7 @@
+commit	a0cc95e3db7b04b6e221f89e89352b0e6b15d5b7
+tree	dirty
+captured_utc	2026-08-17T17:46:05Z
+exit	0
+ms	555
+sha256_out	a051538f9af841fbceb48cf68abcefffc11bc1ee8cc6996a14d900d398624ff1
+sha256_err	e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

docs/experiments/instruments/instrument/plot/evidence/0001-proof.rc

@@ -0,0 +1 @@
+0

docs/experiments/instruments/instrument/plot/evidence/MANIFEST.tsv

@@ -0,0 +1,2 @@
+sha256	bytes	exit	ms	commit	tree	utc	artifact	command
+a051538f9af841fbceb48cf68abcefffc11bc1ee8cc6996a14d900d398624ff1	807	0	555	a0cc95e3db7b	dirty	2026-08-17T17:46:05Z	0001-proof.out	./docs/experiments/instruments/instrument/plot/prove.sh

docs/experiments/instruments/instrument/plot/evidence/RUN.env

@@ -0,0 +1,6 @@
+captured_utc	2026-08-17T17:46:05Z
+git_sha	a0cc95e3db7b04b6e221f89e89352b0e6b15d5b7
+git_dirty	yes
+host	Wills-MacBook-Pro
+uname	Darwin Wills-MacBook-Pro 25.5.0 Darwin Kernel Version 25.5.0: Tue Jun  9 22:28:34 PDT 2026; root:xnu-12377.121.10~1/RELEASE_ARM64_T6041 arm64
+cc	Apple clang version 21.0.0 (clang-2100.1.1.101)

docs/experiments/instruments/instrument/plot/plot.py

@@ -0,0 +1,42 @@
+#!/usr/bin/env python3
+"""Plot instrument. matplotlib is the transfer standard; this file is
+CONFIGURATION of it, not a new instrument. It adds exactly one policy:
+
+    the y-axis includes zero unless truncation is explicitly requested,
+
+because an autoscaled y-axis turns a correct dataset into a false picture, and
+that is the most common way a plot lies.
+"""
+import sys, csv, matplotlib
+matplotlib.use("Agg")
+import matplotlib.pyplot as plt
+import matplotlib.dates as mdates
+from datetime import datetime
+
+def plot(series, out, title, ylabel, truncate_y=False, dates=False):
+    fig, ax = plt.subplots(figsize=(11, 5.2), dpi=160)
+    for name, xs, ys, color in series:
+        ax.plot(xs, ys, marker="o", ms=2.6, lw=1.4, color=color, label=name, zorder=3)
+    if not truncate_y:
+        ax.set_ylim(bottom=0)                      # the policy
+    if dates:
+        ax.xaxis.set_major_locator(mdates.AutoDateLocator())
+        ax.xaxis.set_major_formatter(mdates.DateFormatter("%b %d"))
+    ax.set_ylabel(ylabel); ax.set_title(title, loc="left")
+    ax.grid(True, lw=0.5, alpha=0.35, zorder=0)
+    ax.legend(frameon=False, loc="upper left")
+    for s in ("top","right"): ax.spines[s].set_visible(False)
+    fig.tight_layout(); fig.savefig(out)
+    return ax
+
+def readings(ax):
+    """What the plot ACTUALLY contains — read back off the axes, not off the
+    input. This is what makes the plot checkable."""
+    out = []
+    for ln in ax.get_lines():
+        d = ln.get_xydata()
+        out.append({"label": ln.get_label(), "n": len(d),
+                    "xmin": float(d[:,0].min()), "xmax": float(d[:,0].max()),
+                    "ymin": float(d[:,1].min()), "ymax": float(d[:,1].max()),
+                    "last": (float(d[-1,0]), float(d[-1,1]))})
+    return out, ax.get_ylim()

docs/experiments/instruments/instrument/plot/prove.sh

@@ -0,0 +1,50 @@
+#!/usr/bin/env bash
+# prove.sh — evidence the plot instrument works. Both directions.
+set -uo pipefail
+D="$(cd "$(dirname "$0")" && pwd)"
+python3 - "$D" <<'PY'
+import sys, csv, os
+D = sys.argv[1]; sys.path.insert(0, D)
+from plot import plot, readings
+F=0; N=0
+def chk(name, expected, actual):
+    global F, N; N += 1
+    ok = expected == actual
+    print(f"  {'ok  ' if ok else 'FAIL'}  {name:<44} {'' if ok else f'expected {expected} got '}{actual}")
+    if not ok: F += 1
+
+rows=[r for r in csv.reader(open(f"{D}/reference/KNOWN-SERIES.tsv"), delimiter="\t") if r and not r[0].startswith("#")]
+xs=[float(r[0]) for r in rows]; ys=[float(r[1]) for r in rows]
+
+print("POSITIVE — the plot contains exactly what was given to it")
+ax = plot([("known", xs, ys, "#B0691F")], "/tmp/prove_known.png", "calibration", "y")
+r, ylim = readings(ax)
+chk("point count in == point count plotted", 5, r[0]["n"])
+chk("x range preserved",            (0.0, 4.0), (r[0]["xmin"], r[0]["xmax"]))
+chk("y range preserved",           (5.0, 40.0), (r[0]["ymin"], r[0]["ymax"]))
+chk("final point not dropped/sorted", (4.0, 5.0), r[0]["last"])
+
+print()
+print("POSITIVE — anti-truncation policy holds")
+chk("y-axis includes zero by default", True, ylim[0] <= 0)
+
+print()
+print("NEGATIVE — truncation is possible but must be ASKED for")
+ax2 = plot([("known", xs, ys, "#B0691F")], "/tmp/prove_trunc.png", "truncated", "y", truncate_y=True)
+_, ylim2 = readings(ax2)
+chk("explicit truncate_y raises the floor", True, ylim2[0] > 0)
+
+print()
+print("NEGATIVE — refuses a false expectation")
+chk("a false point count (99) is refused", False, r[0]["n"] == 99)
+
+print()
+print("POSITIVE — an output file is actually produced")
+chk("png written and non-empty", True, os.path.getsize("/tmp/prove_known.png") > 1000)
+
+print()
+import matplotlib
+print(f"  transfer standard: matplotlib {matplotlib.__version__}")
+print(f"  {'PROVEN' if F==0 else 'NOT PROVEN'} — {N} checks, {F} failed")
+sys.exit(F)
+PY

docs/experiments/instruments/instrument/plot/reference/KNOWN-SERIES.WORKING

@@ -0,0 +1,17 @@
+Known properties of KNOWN-SERIES.tsv, derived by hand from the five rows above.
+
+  n points      5
+  x min / max   0 / 4
+  y min / max   5 / 40
+  point at i=3  (3, 40)      -- the maximum, deliberately not last
+  point at i=4  (4, 5)       -- the minimum, deliberately last
+
+Why these values: the maximum is NOT the final point and the minimum IS, so a
+plotter that silently drops the last point, or that sorts, or that plots only
+the running maximum, produces a visibly different reading.
+
+ANTI-TRUNCATION: with y ranging 5..40, a plotter left to autoscale will start
+the y-axis near 5 and make a 3.5x visual change out of an 8x numeric one. For an
+evidence plot the y-axis MUST include zero or be explicitly declared truncated.
+This is the single most common way a correct dataset produces a false picture,
+and it is checked below.

docs/experiments/instruments/instrument/plot/reference/KNOWN-SERIES.tsv

@@ -0,0 +1,7 @@
+# A series whose plotted properties are known BEFORE the plotter runs.
+# x	y
+0	10
+1	20
+2	15
+3	40
+4	5

docs/experiments/instruments/instrument/report/evidence/0001-proof.cmd

@@ -0,0 +1 @@
+./tools/evidence/report-prove.sh

docs/experiments/instruments/instrument/report/evidence/0001-proof.err

@@ -0,0 +1,7 @@
+Traceback (most recent call last):
+  File "<stdin>", line 12, in <module>
+  File "/Users/will/Development/neuron-technologies/foundation/el/tools/evidence/report.py", line 35, in load
+    art = os.path.join(evdir, r['artifact'])
+  File "<frozen posixpath>", line 90, in join
+  File "<frozen genericpath>", line 188, in _check_arg_types
+TypeError: join() argument must be str, bytes, or os.PathLike object, not 'NoneType'

docs/experiments/instruments/instrument/report/evidence/0001-proof.out

@@ -0,0 +1 @@
+POSITIVE — reads and verifies a real evidence directory

docs/experiments/instruments/instrument/report/evidence/0001-proof.prov

@@ -0,0 +1,7 @@
+commit	a0cc95e3db7b04b6e221f89e89352b0e6b15d5b7
+tree	dirty
+captured_utc	2026-08-17T17:53:46Z
+exit	1
+ms	315
+sha256_out	f76d174e98375a9c137936cc77a6675a3076b34fd7e1be8f91be8204aaaa8980
+sha256_err	31646694e108bb5c245b4ab128321bb3b46f30d380d070fa8a3214a4e2e685b3

docs/experiments/instruments/instrument/report/evidence/0001-proof.rc

@@ -0,0 +1 @@
+1

docs/experiments/instruments/instrument/report/evidence/MANIFEST.tsv

@@ -0,0 +1,2 @@
+sha256	bytes	exit	ms	commit	tree	utc	artifact	command
+f76d174e98375a9c137936cc77a6675a3076b34fd7e1be8f91be8204aaaa8980	58	1	315	a0cc95e3db7b	dirty	2026-08-17T17:53:46Z	0001-proof.out	./tools/evidence/report-prove.sh

docs/experiments/instruments/instrument/report/evidence/RUN.env

@@ -0,0 +1,6 @@
+captured_utc	2026-08-17T17:53:46Z
+git_sha	a0cc95e3db7b04b6e221f89e89352b0e6b15d5b7
+git_dirty	yes
+host	Wills-MacBook-Pro
+uname	Darwin Wills-MacBook-Pro 25.5.0 Darwin Kernel Version 25.5.0: Tue Jun  9 22:28:34 PDT 2026; root:xnu-12377.121.10~1/RELEASE_ARM64_T6041 arm64
+cc	Apple clang version 21.0.0 (clang-2100.1.1.101)