gabriel / build-with-muse public
make-wire-episode17-demo.sh bash
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sha256:5472be4fece32b606c308fad9d57295ce327955fb2b87b8beec6ea1626050473 Add published YouTube URL to Episode 00 Sonnet 5 3 hours ago
1 #!/usr/bin/env bash
2 # Builds wire-episode17/ and drives a real push/clone against the local
3 # MuseHub hub for Episode 17 ("The Wire Protocol"). Requires the local
4 # MuseHub dev stack running. Re-run to regenerate; never hand-edit the
5 # repo directory directly.
6 set -euo pipefail
7
8 HERE="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
9 REPO="$HERE/wire-episode17"
10 CLONE_DIR="$HERE/wire-episode17-clone"
11
12 rm -rf "$REPO" "$CLONE_DIR"
13 mkdir -p "$REPO"
14 cd "$REPO"
15
16 muse init --json | python3 -m json.tool
17 echo "hello wire protocol" > README.md
18 muse code add .
19 muse commit -m "Initial commit for wire protocol demo" \
20 --agent-id claude-code --model-id claude-sonnet-5 --sign
21
22 echo
23 echo "=== Part 1: build a real wire mpack, parse it by hand ==="
24 COMMIT=$(muse rev-parse HEAD --json | python3 -c "import json,sys; print(json.load(sys.stdin)['commit_id'])")
25 python3 - "$COMMIT" <<'PY'
26 import sys, struct, hashlib, pathlib
27 sys.path.insert(0, str(pathlib.Path.home() / "ecosystem" / "muse"))
28 from muse.core.mpack import build_mpack, build_wire_mpack
29
30 commit_id = sys.argv[1]
31 root = pathlib.Path(".")
32 mpack = build_mpack(root, [commit_id], have=set())
33 wire = build_wire_mpack(mpack, meta={"repo_id": "demo", "branch": "main", "head_commit_id": commit_id})
34 pathlib.Path("wire.mpack").write_bytes(wire)
35
36 print("total wire size:", len(wire), "bytes")
37 print("header (hex):", wire[:6].hex(' '))
38 version, section_count = struct.unpack_from("<BB", wire, 4)
39 print(f"magic={wire[:4]!r} version={version} section_count={section_count}")
40
41 names = {1: "BLOBS", 2: "COMMITS", 3: "SNAPSHOTS", 4: "TAGS", 5: "META"}
42 cursor = 6
43 for i in range(section_count):
44 sec_type = wire[cursor]
45 sec_offset, sec_length = struct.unpack_from("<QQ", wire, cursor + 1)
46 print(f" [{i}] type={sec_type} ({names.get(sec_type)}) offset={sec_offset} length={sec_length}")
47 cursor += 17
48
49 footer = wire[-32:]
50 computed = hashlib.sha256(wire[:-32]).digest()
51 print("footer match:", footer == computed)
52 PY
53
54 echo
55 echo "=== Part 2: tamper with one byte, confirm the footer catches it ==="
56 python3 - <<'PY'
57 import sys, pathlib
58 sys.path.insert(0, str(pathlib.Path.home() / "ecosystem" / "muse"))
59 from muse.core.mpack import parse_wire_mpack
60
61 data = bytearray(pathlib.Path("wire.mpack").read_bytes())
62 data[200] ^= 0xFF
63 try:
64 parse_wire_mpack(bytes(data))
65 print("NO ERROR RAISED -- would be a bug")
66 except Exception as e:
67 print(f"Correctly rejected: {type(e).__name__}: {e}")
68 PY
69 rm -f wire.mpack
70
71 echo
72 echo "=== Part 3: a real push over the wire (verbose transcript) ==="
73 muse -C ~/ecosystem/musehub hub repo delete gabriel/wire-episode17 --yes --json > /dev/null 2>&1 || true
74 muse -C ~/ecosystem/musehub hub repo create --name wire-episode17 --visibility public --json | python3 -m json.tool | head -6
75 muse remote add local https://localhost:1337/gabriel/wire-episode17 --json > /dev/null 2>&1 || \
76 muse remote set-url local https://localhost:1337/gabriel/wire-episode17 --json > /dev/null
77 muse push local main --force --json
78
79 echo
80 echo "=== Part 4: a second, incremental commit -- only new blobs travel ==="
81 echo "second line" >> README.md
82 muse code add README.md
83 muse commit -m "Second commit, shares two objects with the first" \
84 --agent-id claude-code --model-id claude-sonnet-5 --sign
85 muse push local main --json
86
87 echo
88 echo "=== Part 5: clone -- the asymmetric, simpler fetch path ==="
89 mkdir -p "$CLONE_DIR"
90 cd "$CLONE_DIR"
91 muse clone https://localhost:1337/gabriel/wire-episode17 --json | tail -20
92
93 echo
94 echo "Demo built at $REPO and $CLONE_DIR"
File History 1 commit
sha256:5472be4fece32b606c308fad9d57295ce327955fb2b87b8beec6ea1626050473 Add published YouTube URL to Episode 00 Sonnet 5 3 hours ago