jonnify·bcs /bcs/overview

B0 · Overview

The whole idea, in three dives.

The shortest path into the Branded Component System: the one move it makes, the contract that move leaves behind, and the shape of the stack the rest of the course builds.

Three dives. Read these, and every later chapter is an elaboration of one of them.

The anchor: a 14-byte branded id. Select a field to read its job.
USRnamespace 0KHTOWnGLuC eleven base62 = the 63-bit snowflake below timestamp · 41 bits node · 10 seq · 12 epoch 2024-01-01 · horizon September 2093
readout · Select a field. The first three characters are the type; the remaining eleven are the instant, the machine, and the order within the millisecond.
§1

The three dives

each a leaf, the teaching
B0.1

The one relocation

The single move: the encapsulation boundary leaves the object and surrounds the system, and the object’s last possession — its name — is promoted to the interface.

dive 1 of 3 B0.2

Identity as a contract

Why the name is not a string but a contract: typed by namespace, ordered by mint time, placed by hash, conformant across runtimes.

dive 2 of 3 B0.3

The stack and the floor

The shape of what the course builds: echo_data, the bus, the store, and the durable floor beneath the volatile tiers.

dive 3 of 3

A chapter is three dives. Each dive is one idea with one figure you can take apart.

§2

The contract, verified

echo_data · branded_id.ex

The id is fourteen printable bytes: a three-byte namespace and eleven Base62 characters carrying a 63-bit snowflake. The course inherits one rule from the manuscript — a number the committed tree cannot prove does not appear — and the contract proves its own, asserted at boot before either code path is trusted: placement(USR0KHTOWnGLuC) is 234878118 on the native and pure paths alike.

echo_data · branded_id.ex · the vectors self_check! asserts at bootverified
placement(USR0KHTOWnGLuC)        →  234878118            native and pure agree
parse(USR0NgWEfAEJfs)            →  {:ok, "USR", 320636799581945856}
decode(USRzzzzzzzzzzz)           →  :error               an overflow is refused, not wrapped
§4

The doors

the sibling courses
/echomq

EchoMQ — the protocol, in depth

The bus B3 narrates, taught rung by rung: the keyspace, the Lua inventory, and the 3.0 Stream Tier — XADD, XREADGROUP, XACK — with conformance on Valkey.

 /redis-patterns

Redis Patterns Applied

The substrate patterns under the bus: sorted sets, atomic Lua moves, locks, and streams — the judgement layer.

 /echo-persistence

Echo Persistence — the durable floor

Beneath the volatile tiers: the Graft page engine built twice, the commit-LSN loop, and the stream archive on Tigris. Where Part I says state lives somewhere, this says where it lives durably.
§4

References

sources · related

Sources

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