Fix ToolNotFoundError: memory_find when ChromaDB is unavailable

[Copilot]

The system prompt unconditionally instructed the LLM to call memory_find as its mandatory first action, but memory tools are only registered with the agent when shared_vectordb_client is Some. When ChromaDB is not configured or fails to connect, the LLM still attempts the call, producing ToolNotFoundError: memory_find on every message.

Changes

• constants.rs: Added SYSTEM_PROMPT_NO_MEMORY — a variant of the system prompt with the mandatory memory retrieval step, memory tool notes, and memory rules removed. Added build_system_prompt(has_memory_tools: bool) -> &'static str to select between the two. Also fixed a pre-existing typo (aggreable → agreeable).

• agent.rs: Replaced static .preamble(SYSTEM_PROMPT) with .preamble(build_system_prompt(shared_vectordb_client.is_some())), aligning the agent's instructions with its actual registered toolset.

// Before
let mut agent_builder = llm_client
    .agent("gemini-3-flash-preview")
    .preamble(SYSTEM_PROMPT)  // always includes mandatory memory_find step

// After
let has_memory_tools = shared_vectordb_client.is_some();
let mut agent_builder = llm_client
    .agent("gemini-3-flash-preview")
    .preamble(build_system_prompt(has_memory_tools))  // omits memory instructions when tools absent

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• cdn.pyke.io
  • Triggering command: /home/REDACTED/work/website/website/target/debug/build/ort-sys-777fcbc04738e5d0/build-script-main /home/REDACTED/work/website/website/target/debug/build/ort-sys-777fcbc04738e5d0/build-script-main /home/REDACTED/work/website/website/target/debug/deps/librustc_hash-d607bcef25eb77-I /home/REDACTED/work/website/website/target/debug/deps/libregex-901dd4b1c30edd8b.rl/home/REDACTED/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/aws-lc-sys-0.39.1/include /home/REDACTED/work/website/website/target/debug/deps/libregex_automata-81b7502384-I /home/REDACTED/work/website/website/target/debug/deps/libregex_syntax-b4a05c81c718/home/REDACTED/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/aws-lc-sys-0.39.1/aws-lc/include 9.1/generated-include /home/REDACTED/work/website/website/target/debug/deps/libeither-63f923717c242b89.r/home/REDACTED/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/aws-lc-sys-0.39.1/aws-lc/third_party/s2n-bignum/include 9.1/include /home/REDACTED/work/website/website/target/debug/deps/liblibloading-faa6c5bf817954/home/REDACTED/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/aws-lc-sys-0.39.1/aws-lc/third_party/s2n-bignum/s2n-bignum-imported/include 9.1/aws-lc/include /home/REDACTED/work/website/website/target/debug/deps/liblibc-5a1706567bedcee1.rlib 9.1/aws-lc/third_party/s2n-bignum/include 9.1/�� 9.1/aws-lc/third_party/s2n-bignum/s2n-bignum-imported/include 9.1/aws-lc/third_party/s2n-bignum/s2n-bignum-imported/include 9.1/aws-lc/third_party/jitterentropy/jitterentropy-library f/aws-lc-sys-0.3cc uild/syn-cfb0e64-m64 f/aws-lc-sys-0.3/home/REDACTED/work/website/website/target/debug/build/libxml-de86e7b8bf16e3bb/rus-g /out/ebcd52e9457b6221-x509.o (dns block)
  • Triggering command: /home/REDACTED/work/website/website/target/debug/build/ort-sys-1af73e47a7997777/build-script-main /home/REDACTED/work/website/website/target/debug/build/ort-sys-1af73e47a7997777/build-script-main -std=c11 -I /home/REDACTED/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/aws-lc-sys-0.3--64 hVCy/list /home/REDACTED/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/aws-lc-sys-0.3/home/REDACTED/work/website/website/target/debug/build/aws-lc-sys-4da5b4205aeecb8a/out/27a075eab3d35364-pem_pkey.o -I /home/REDACTED/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/aws-lc-sys-0.39.1/aws-lc/include e0e40e564.derive_builder_macro.65935b84f9407ab8-cgu.0.rcgu.o /home/REDACTED/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/aws-lc-sys-0.39.1/�� e0e40e564.9lvd27ii7256cnzv6hasv8m68.rcgu.o /home/REDACTED/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/aws-lc-sys-0.39.1/aws-lc/third_party/s2n-bignum/s2n-bignum-imported/include 9.1/�� d9e1a8bda17.rlib rlib 775a.rlib lib (dns block)
  • Triggering command: /tmp/codeql-scratch-a9c55f7acc8420df/dbs/rust/working/target/debug/build/ort-sys-1af73e47a7997777/build-script-main /tmp/codeql-scratch-a9c55f7acc8420df/dbs/rust/working/target/debug/build/ort-sys-1af73e47a7997777/build-script-main -I /home/REDACTED/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/aws-lc-sys-0.3--gdwarf-4 -I /home/REDACTED/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/aws-lc-sys-0.3-o s-a30eea7215112681/out/libonig.a s-a30eea7215112681/out/a445302c6d3dcb51-iso8859_10.o s-a30eea7215112681/out/a445302c6d3dcb51-iso8859_11.o s-a30eea7215112681/out/a445302c6d3dcb51-iso8859_13.o s-a30eea7215112681/out/a445302c6d3dcb51-iso8859_14.o s-a30eea7215112681/out/a445302c6d3dcb51-iso8859_15.o s-a30eea7215112681/out/a445302c6d3dcb51-iso8859_16.o s-a30eea7215112681/out/a445302c6d3dcb51-euc_tw.o s-a30eea7215112681/out/a445302c6d3dcb51-euc_kr.o s-a30eea7215112681/out/a445302c6d3dcb51-big5.o s-a30eea7215112681/out/a445302c6d3dcb51-gb18030.o s-a30eea7215112681/out/a445302c6d3dcb51-koi8_r.o s-a30eea7215112681/out/a445302c6d3dcb51-cp1251.o s-a30eea7215112681/out/a445302c6d3dcb51-euc_jp_prop.o s-a30eea7215112681/out/a445302c6d3dcb51-sjis_prop.o (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)